Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf8044fce6df25b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-08 13:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 839840939db84f9f7080052b087e1637 SHA-1: 1660e134b42cdc488b5459e83ea721c347dddeca SHA-256: 2cf8044fce6df25b852a91d5571843487b1b6e966c5658bf6c236c092786655c
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting a lure to download further 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.com/pify?keyword=letter+n+worksheets+pdf
    • http://files.drrebeccaaptekersandtonpsychology.com/uploads/1/3/0/7/130740625/c543f0c.pdf
    • http://files.douxoverdesign.com/uploads/1/3/1/3/131383624/8070596.pdf
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdf
    • http://files.notesinthemargin.co.uk/uploads/1/3/1/4/131453498/fcdbfccb43.pdf
    • https://cdn.shopify.com/s/files/1/0435/0056/8736/files/gelogepazawumukoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/polychlorinated_biphenyls.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/57367307892.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/fetekapikoveno.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/gezekajetemifadebobezeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/wiwamuzemolusazovirokivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/13784607846.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/guwalopunomitazamodudod.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2674/files/67882383237.pdf
    • https://cdn.shopify.com/s/files/1/0431/5591/4918/files/application_of_non_aqueous_titration.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/kejotobujube.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/widerevoruruzeluleku.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_off00006014.bin
92bccd7ab45fe7395bedc442c1dabf51f5b968b3b74ef8babb303be283ae34cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 4984 bytes
font_01_sfnt_off0000711c.bin
08d2a6ff4b3186f4e5246b324fe66d427d7962dfe6eee3f31d0615756365bd85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711C 10136 bytes

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