Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76c0742130b6f46…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 15:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 987a03aa22cacef2169b12e4969fcf86 SHA-1: 3bacbc233cb4c1361342c4860dd49373dc0c0467 SHA-256: a76c0742130b6f46aa8615ddcabc6061b8cb68079cbd2c196b6076acbc9ba0ff
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm designed to manipulate search engine results or redirect users to malicious content. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=fed+up+documentary+questions+and+answers'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure.

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.com/pify?keyword=fed+up+documentary+questions+and+answers
    • http://files.jacobbutterfieldheaportfolio.com/uploads/1/3/0/9/130969046/numaruli.pdf
    • http://files.spiritual-alignment.com/uploads/1/3/1/3/131398094/6702310.pdf
    • http://files.halfhuman.org/uploads/1/3/0/8/130813821/2775119.pdf
    • http://tisezo.getfocuscounseling.com/uploads/1/3/0/9/130969440/36547b.pdf
    • http://files.cobaltcommunityresearch.org/uploads/1/3/0/8/130874254/b293b8efa557.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/13750942455.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/pedake.pdf
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/velorumakekopuzubimoburu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/titedarososuzujinisasar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/renigagiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/49173710975.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/ruxefanojozinuras.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/30028367412.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/mirezofekejuvadudirulo.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_off00005dc6.bin
d5dad868080b3b44a7bc11bb9bb958d01e3e02ec964ec9a0a25a690e4ae3158d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC6 5464 bytes
font_01_sfnt_off00007059.bin
3711e3df68a91a7e5d7bffa5aebd10f1b0d2ccfaf50d1fc5f9860ee0482f6bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 11676 bytes

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