Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab555a057ca54ae6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-06 20:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586b6bdcd964b78244937ad62035de82 SHA-1: 91e88772c27397cad5a1adc758339f5f7cde7fa2 SHA-256: ab555a057ca54ae6e994e14ce8383745ce74d3cfe7e49c08fae653aee62c8e69
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, masquerading as academic accreditation information, which are designed to redirect users to malicious websites. The primary redirector URL identified is https://ttraff.com/pify?keyword=acreditaci%25C3%25B3n+universitaria+pdf. The document also hosts a large number of external PDF links, many of which point to Shopify domains, likely as part of a link farm to improve search engine ranking for malicious content.

Heuristics 3

  • 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.
  • 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=acreditaci%25C3%25B3n+universitaria+pdf
    • http://files.lifequestcc.org/uploads/1/3/1/8/131856135/purokuxevoxuzirevuj.pdf
    • http://files.zwanzigerrealty.com/uploads/1/3/1/8/131871692/fegiwi-juzipivabo.pdf
    • http://fesigeg.icollie.com/uploads/1/3/0/7/130775413/kefegupoxe.pdf
    • http://files.trimmedandtraveled.com/uploads/1/3/1/8/131871704/guwobixux-momijovejufozed-vawol-moxarosebabine.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/54483157891.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/22716430798.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/jituxelukarunedotolixopat.pdf
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/zoxozuliji.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/wunawowenixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5289/files/walamezuditex.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/jazafexiputijapodovomevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/nitawumawetava.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/ielts_general_listening_answer_sheet.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a7.bin
65296f1a934cf1a7cd5417b2dd1271820adcb062a4ca0454df695adf55cf4b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A7 5300 bytes
font_01_sfnt_off00007989.bin
5fbbb321d2d5870ce2f6c05f5e766a6b042e99dc36f612335fab07bfa64eda24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7989 10572 bytes

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