Malicious PDF — malware analysis report

Static analysis result for SHA-256 a905a31a718e3892…

MALICIOUS

PDF

105.8 KB Created: 2020-08-11 21:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4df9bc86fa1d8e2aeb3980bc25e124e4 SHA-1: 32f76b30aee9528b560df70eb67bb16d0c4a8766 SHA-256: a905a31a718e389213574c3f8fa106fd37127e9b4c01e3fadf729554a62eb8f1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link, 'https://ttraff.ru/pify?keyword=cold+war+timeline+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'cold war timeline pdf' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The presence of many external links, including to Shopify, indicates a link farm strategy to improve search engine ranking for the 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.ru/pify?keyword=cold+war+timeline+pdf
    • http://files.michaelgierl.com/uploads/1/3/0/8/130874326/beroniditenabeb.pdf
    • http://files.menortheast.org/uploads/1/3/1/4/131482941/bixeto_rugorako_fiwewoxoj.pdf
    • http://files.psuaaao.org/uploads/1/3/0/7/130740258/jepezoxibapewaf_wazevoti.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/79161309694.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/26701948480.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/the_beebo_brinker_chronicles.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lurexemip.pdf
    • https://cdn.shopify.com/s/files/1/0439/2402/9608/files/al_quran_rumi_dan_jawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6220/6357/files/4999551985.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/23976610279.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/9455743830.pdf
    • https://cdn.shopify.com/s/files/1/0434/1304/5398/files/love_notes_for_him.pdf
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/rejeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/gtx_770_vs_1060.pdf
    • https://cdn.shopify.com/s/files/1/0452/1459/7271/files/resuscitation_guidelines.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_off0001633a.bin
087755473189bd1fb8bc2298fc0dfd4da141fc61315ebb147afe157763564dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1633A 5004 bytes
font_01_sfnt_off0001743f.bin
1ccb126ff7e040e045587e8ee7cbd43d82f1d8e6b4effc5e510178c9c144d936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1743F 11048 bytes

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