Malicious PDF — malware analysis report

Static analysis result for SHA-256 758d6063d580d8d9…

MALICIOUS

PDF

48.7 KB Created: 2020-07-13 04:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: d407c943c6362d6ccddb7803621fab0a SHA-1: 1a1a0a50a1487bb4f67079ae72724ff12799fd5c SHA-256: 758d6063d580d8d9b3a8837f88b1bf504e6b281b25f209ebc26b010bca88fe57
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate documents, but they redirect to a malicious domain (ttraff.cc). This technique is commonly used for phishing or malware distribution, masquerading as a free download. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wb?keyword=numerical%20integration%20solved%20problems%20pdf In PDF document text
    • http://files.robynshaw.net/uploads/1/3/2/6/132695465/tokefadi-matatu.pdfIn PDF document text
    • http://files.artandroulla.com/uploads/1/3/1/3/131380773/6e51b943ebb202b.pdfIn PDF document text
    • http://files.burnswharf.net/uploads/1/3/1/6/131606819/lofufitamo-putoruxarop.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/1/0430/1602/8309/files/tigexafefapasitejugesixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/wigizotigutavizolagot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/benebinufuzuwak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdfIn PDF document text
    • https://poguzotu.files.wordpress.com/2020/07/53814443953.pdfIn PDF document text
    • https://jinejejinuku.files.wordpress.com/2020/07/jidekarevirofuwewabodur.pdfIn PDF document text
    • https://zuzilunox.files.wordpress.com/2020/06/wojidus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56346524494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/peweradenazeranogivik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/wavenuzumeruxago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/demapiruxiwegonigiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/betibezebogamupod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/lagobebewaborovivoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/sukubof.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AB 5524 bytes
SHA-256: d541e497b5003627b704c7979084b8b77d0e79b6d1b4050a2f86cbcac322dcbd
font_01_sfnt_off0000885a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885A 14184 bytes
SHA-256: c46d109c870c3e4b71ca4801ce0e0e71c87ccd7e85ab695c3c07763f06a62412

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