Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afeb9c47ac0e391…

MALICIOUS

PDF

48.0 KB Created: 2020-10-19 21:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ab44cc220f7ec6c23a11cb8cefef5feb SHA-1: 2d1c92660928486055ec64338aa3a627c173ca15 SHA-256: 6afeb9c47ac0e3910bcae5f091d41d0a7a0d655aa7d9887d91a2e9186872b240
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links that point to malicious redirectors and SEO link farms. The primary redirector URL is https://ttraff.me/123?keyword=blackarmor+nas+220+user+guide, which likely serves as a gateway to further malicious content. The document's structure and link farm indicate an attempt to disguise malicious activity as legitimate content, aiming to trick users into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=blackarmor+nas+220+user+guide In PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/rafojizakanafegogux.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/zojoju_molase_meditabibu.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/2078437.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/3408347.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/3969f5b0f.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/risujinenabus-zudomosimoko-nesexob.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/finajipot.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/fuxebugipokaf-xesifujodok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f874edb7378a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f899e9d0b176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f8bcc231ddd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f86f6fb9cc8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f86fe6842b5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f889a065f2f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0701/5069/files/12004603868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/wemagakanemunasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/gestor_de_archivos_para_android_desde_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/blue_springs_ranch_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/gixojutenafitoxovap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/54602161682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/9.3_1.2_packet_tracer_resuelto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0642/5249/files/lalivizuximegozije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6677/7500/files/degradacion_quimica_del_suelo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8E 5644 bytes
SHA-256: 1ea861e728db5c10f2636c6569dc385bdf1949d44a9497fde830803182085d8f
font_01_sfnt_off00006ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA3 1648 bytes
SHA-256: 4a8ebde5e94bd7e49bcaf164f77963ab18066d5334cf8871f4ac3f3f313d9c8a
font_02_sfnt_off000076e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 10492 bytes
SHA-256: 1484acdd462e5251d7895c94e2a742d1ea03d81be0918f50aacecf3d8220b854
font_03_sfnt_off00009aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA4 16204 bytes
SHA-256: f04fb96856fa86c99babb5bf309615b780632e07d2318923ed038a7bfd4fd4ce

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