Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d385b07203aceb…

MALICIOUS

PDF

43.7 KB Created: 2020-10-06 14:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9dbeb17cc6737dd2229f91625b161fed SHA-1: 0c845e56ecc23d7ed57dfcfa329a0dbda61fddc2 SHA-256: a4d385b07203aceba534aa1d15eacefe588ddedfe959671f2b26b53ddbb429d1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/pify?keyword=softball+field+position+numbers In PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/wadizibufijag.pdfIn PDF document text
    • https://site-1041207.mozfiles.com/files/1041207/xopiw.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/xilipakisazamen.pdfIn PDF document text
    • http://files.beechwoodnaturopathy.com/uploads/1/3/0/7/130776351/16ee77.pdfIn PDF document text
    • http://gujemisos.sanantoniosalsaon2.com/uploads/1/3/1/1/131164250/82b3af18.pdfIn PDF document text
    • http://mijaz.mark-paul-smith.studio/uploads/1/3/1/6/131606165/5447161.pdfIn PDF document text
    • http://files.buggybarnmuseum.com/uploads/1/3/0/7/130738939/1459293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7902/5059/files/arcadeprehacks_bubble_tanks_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7539/0625/files/the_french_angel_maurice_tillet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7612/0476/files/11579599427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3595/0241/files/thaumaturge_ffxiv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3186/2679/files/artificial_intelligence_tok_knowledge_issues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/lujare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/bounce_pro_trampoline_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 5312 bytes
SHA-256: 676da1ad96ac9495c4096f74a16654e0184d600b63ba4f5494def4d8ed8c1645
font_01_sfnt_off00007110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7110 10208 bytes
SHA-256: 565eba1b8ebc835a10556be0042067110cfddfe5f510eed2be9a61625627b8e0
font_02_sfnt_off000093f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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