Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e03c6efb4465f6…

MALICIOUS

PDF

49.6 KB Created: 2020-08-14 05:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f66de246613e9b7e32ca00eba9b09fd4 SHA-1: 1edfdc93ff374fa791952d0d80e62bae7bf1d603 SHA-256: 13e03c6efb4465f64e9da5842ac36ffae172748744401d1e5d976a278e42d389
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'ttraff.com'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially harmful websites through a link farm disguised as document content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wb?keyword=role%20of%20technology%20in%20crime%20prevention%20pdf
    • http://wogujol.opryconsulting.com/uploads/1/3/1/4/131436977/xikubajitem_gejom.pdf
    • http://rakulexir.premsc.com/uploads/1/3/2/3/132303189/jigelabe_sovet_keledax.pdf
    • http://files.lifes-a-trip.com/uploads/1/3/1/8/131871424/penekovuxen-xonevunuju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/love_252byou_andi_252bimages.pdf
    • https://cdn.shopify.com/s/files/1/0432/7509/2132/files/75605338264.pdf
    • https://cdn.shopify.com/s/files/1/0431/7095/5415/files/sejarah_amandemen_uud_1945.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/kofeludovupalinev.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/nakufesoruwasurutagike.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/xotobisojowapulunusotamow.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/66242386944.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/83308683126.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/new_vegas_jsawyer.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2325/files/sales_incentive_plans.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/upsc_cds_ota_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/basketball_score_sheet_fiba.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c87.bin
523789f9846e2cce3228a234047fc48652259c41bb743f6391c95386f38950be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C87 5348 bytes
font_01_sfnt_off00007ea2.bin
961de69741be93b9343665f4e1f106e22687ff2e883151d81a0f23777698ff6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA2 9720 bytes
font_02_sfnt_off0000a018.bin
08fc53de2a166f5bfb9e3ba992aebc9194b4a196913d34b574925354ef599967		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA018 17168 bytes

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