Malicious PDF — malware analysis report

Static analysis result for SHA-256 092aa02e760d253b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 19:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8747115edd4f29d40e970798d244685 SHA-1: 1e871e428f5cdda05672b194318b821e89b7ed83 SHA-256: 092aa02e760d253bc40f7fc8be9ade4c0d10ed317efdda97a120150bc3921137
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at ttraff.com, which is likely the primary malicious objective. The document body, though heavily obfuscated, contains the target URL and keywords that might be used for SEO. The ML classifier strongly indicated maliciousness.

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/pify?keyword=cement+pipe+manufacturing+process+pdf
    • http://files.thesanctuaryatmn.com/uploads/1/3/1/8/131856184/d83262d07.pdf
    • http://nuradeno.avialinn.com/uploads/1/3/1/6/131606289/julalozulevu-sowokesawuwif-puvesi-wubol.pdf
    • http://fiweze.monmouthmethodist.org/uploads/1/3/0/9/130969045/0d82f280897c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/tixojol.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/minimal_pairs_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/78289526992.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/lezamulegub.pdf
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/19516874820.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/5816697795.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/63898763347.pdf
    • https://cdn.shopify.com/s/files/1/0453/4956/8667/files/25533419940.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8291/files/by_the_way_bass_tab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/fazezepizeziposodabezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1966/5561/files/nusug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/32659273370.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006891.bin
73b35d94bf12e2e6823bbe843075ad450d121b86e0573f9727622a650fd6b7d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6891 5348 bytes
font_01_sfnt_off00007aa0.bin
5f2dc896507351fa1f38248438e6a4eeee196be9a4005177df2fad49b6fb99a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA0 10196 bytes

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