Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eb1ce5bb0d7ad8…

MALICIOUS

PDF

45.7 KB Created: 2020-08-09 10:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00759bf22f698a0efec758992b60acbe SHA-1: d6ec947608d21d9b4bad2223a23268d7b53e14b3 SHA-256: 65eb1ce5bb0d7ad80e1c3c88f6b3d1f1fbcda011198ed3de1543ffe90a5b1a6c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=pdf+to+word+converter+app+free+download+for+android', is flagged as a malicious redirector. The document body also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, supporting the attack pattern of luring users to malicious infrastructure.

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=pdf+to+word+converter+app+free+download+for+android
    • http://files.drranshaw.com/uploads/1/3/0/8/130813696/7406660.pdf
    • http://files.flypaperlit.com/uploads/1/3/1/3/131379213/cccb1205a56.pdf
    • http://files.robertkaltenbach.com/uploads/1/3/1/4/131409755/notafep.pdf
    • http://likowabu.owl-valley.co.uk/uploads/1/3/1/3/131398140/8550412.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/papixusisijipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/95785206372.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/4048616869.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0447/8880/9879/files/biodiversity_hotspots_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/8447/9641/files/starter_html_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0976/8600/files/polivewerokexesuserilun.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/occupational_therapy_in_mental_health.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/sabevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/xifapafaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazexirorojukulovamedifuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/download_wondershareelement_pro.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/52411201393.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006828.bin
cb8c1647fd21d30df2b47e07a41524e36fa560e66ca832fbdd60ac554583f3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6828 4912 bytes
font_01_sfnt_off000078f2.bin
7e1b75ba03cd905891fa19204c6afd473e687f9badf2f22b13b13c488c429915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F2 9924 bytes
font_02_sfnt_off00009ae9.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE9 4324 bytes

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