Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e273f0c284f96b3…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 10:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8bc62edc1274790a7bd766a16d35f2d SHA-1: aacdd02c2863dcc2e775bffe35892db73c8d9483 SHA-256: 6e273f0c284f96b35e3ea2f4628109362542f06bea81cacf9352f3307d83314a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=seismic+survey+for+oil+and+gas+exploration+pdf'. It also exhibits characteristics of an SEO link farm, with numerous links to PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF links, suggesting a lure to disguise malicious redirection. No scripts were extracted, but the embedded URLs and redirector link are strong indicators of a phishing or malware distribution attempt.

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.ru/pify?keyword=seismic+survey+for+oil+and+gas+exploration+pdf
    • http://files.puertoricandj.com/uploads/1/3/0/8/130814042/7a67db545ef3.pdf
    • http://tegitika.thetiegenfoundation.org/uploads/1/3/1/0/131071164/lawasetigoza_ligejup_kikojudokel.pdf
    • http://files.fracturedpottery.com/uploads/1/3/0/9/130969440/visaxojoninig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/buwuwirobiferi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/loboxiterawurimul.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/blogging_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/vevegesefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/zodavugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/tibirageroneluvarulesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/english_for_business_communication_student_s_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/intermediate_accounting_spiceland_7th_ed.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5045/files/13084619351.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/murumuxuwagulel.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/49034805676.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_off00006604.bin
032621d074c0da2261be48824465fe7295a45aa6451a6116789bdbc8d4febeaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 5808 bytes
font_01_sfnt_off000079c6.bin
a7d7c11b8dacf597a0a26b29c63ce313b1a083aa10a6a2017e3adf9ff1358dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C6 9912 bytes

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