Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acbf1711cb491cf…

MALICIOUS

PDF

46.4 KB Created: 2020-08-11 07:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0160e779d55f0fd2f1634e955e44aa6a SHA-1: 4083e5d2c121677ea08d4184f32e822ae9ae9586 SHA-256: 9acbf1711cb491cf30d8b2ef5f04ad82e6b23feae7cf4bbcc98f47fce64f732a
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments and a URL that suggest a lure for a free PDF, likely leading to malware. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=busting+loose+from+the+money+game+free+pdf
    • http://wonesasit.jorricmatthews.com/uploads/1/3/2/3/132302780/c8e55b1c.pdf
    • http://files.oshadows.org/uploads/1/3/1/4/131452858/xudajise_lulolunos.pdf
    • http://files.hornadaybsa.com/uploads/1/3/0/7/130740368/3aacf28f12.pdf
    • http://files.marhamchurch-pc.gov.uk/uploads/1/3/1/4/131408942/4510244.pdf
    • http://mijojupu.jasbinderbilan.co.uk/uploads/1/3/1/0/131071157/0cff627a6d8.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/tibigade.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/69145866096.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/zamerogog.pdf
    • https://cdn.shopify.com/s/files/1/0444/5339/6647/files/jumemowefokegorubujoguso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nowivozepax.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/88095641206.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/57120338019.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/zidusemi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/faboderapugadubera.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/guzumof.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5891/files/lakev.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/rukiselaropudabi.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_off000074f6.bin
561a585d48ed3beb6815f789be385418c4fdbe0e9e0f467caa1451dd9f82da93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F6 5604 bytes
font_01_sfnt_off000087dd.bin
da83785dee2195cf93a21e64aebc52f35bcb7064c22ab822b72f548ca30bbddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DD 10256 bytes

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