Malicious PDF — malware analysis report

Static analysis result for SHA-256 40adec9d66a34beb…

MALICIOUS

PDF

40.7 KB Created: 2020-08-16 00:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f681a4fe9e261300a125d7ecec515695 SHA-1: 72330e11092d0293e0024fe55e9ef1e2614d5f7d SHA-256: 40adec9d66a34bebabda9293deb9825ba1a615ee8b42d2ade30bf648b0a6bab5
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=social+security+disability+income+guidelines'. The document body also contains this URL and other links to PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.cc/pify?keyword=social+security+disability+income+guidelines
    • http://pupos.nathandmaki.com/uploads/1/3/0/7/130775823/jenelab.pdf
    • http://files.jakesden.com/uploads/1/3/2/6/132682281/03bcd41.pdf
    • http://xubosu.rekwiredcosmeticsllc.com/uploads/1/3/1/4/131405927/1481006.pdf
    • http://files.acworthexpandinghorizons.org/uploads/1/3/2/6/132682076/doferugoti-zigaborikagun-toviribejuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3297/files/siwudasuragoxutakon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8763/4338/files/fekofixenujubozivepuvovol.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/vozakimajodoza.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/wileloj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/25520498438.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/46091024778.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/99788812574.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5478/files/dulekekazufikimunawonez.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/41935053943.pdf
    • https://cdn.shopify.com/s/files/1/0432/5975/6708/files/mumurugiwigubelose.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_off00006170.bin
eefdab3d278bd1f7559d2a5d4dd26f2c6058190e6c4ebbf12fa06943ed7468bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6170 5604 bytes
font_01_sfnt_off0000745a.bin
25f2fa3a7912e273d5744791a50f800f64455300a71403b2a24efcc7d5499a82
pdf-font-stream PDF embedded font (sfnt) at offset 0x745A 9864 bytes