Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dcd896a5d9a655…

MALICIOUS

PDF

48.3 KB Created: 2020-07-29 20:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44bd0211864fdd8538b19e595f89aef7 SHA-1: 3bbb3250361fdb482f4548ecc437660da5fb83b9 SHA-256: 96dcd896a5d9a655278c9959a238c40ae0663db54c1e6c23b75649bc5337bf46
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'project risk assessment template'. The presence of multiple external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially distribute further malicious content or improve SEO for malicious sites. The primary malicious IOC is the redirector URL.

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=project+risk+assessment+template+pdf
    • http://files.greenkeepersblog.com/uploads/1/3/1/0/131070169/309607.pdf
    • http://files.twostallionsthailand.com/uploads/1/3/0/7/130776516/eb3264e90.pdf
    • http://files.talentstor.com/uploads/1/3/1/0/131070842/a9477c25c8b8.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/90748354877.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/99464550903.pdf
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/kixumefit.pdf
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/fesixejatumod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35031547028.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/67260749294.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/rineluravuzurudimigipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/86442878504.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/1220604497.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/81015124423.pdf
    • https://cdn.shopify.com/s/files/1/0438/9168/7579/files/97686334273.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fbf.bin
ae73e64670c186b1f2728b9f980175efc0174ac0d5f897994d9f1122f9bdb6a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBF 5228 bytes
font_01_sfnt_off00009170.bin
41fb7254c2786fd0cf4e15349c53976a61b130580ca90370532376d6e53ec570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9170 10300 bytes

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