Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b90f7d2959b22d…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 23:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f71f766134f5cdf0fa20ca5dd34cfb8 SHA-1: 0bc60f46ecaa19c5448f340440de936aab53bb0b SHA-256: 53b90f7d2959b22da3e12cb10bf33db41cb6604bf42a578bf3c68a2acad66ab6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=flavonoids+anticancer+pdf'. This URL is likely used to redirect the user to a malicious site, potentially for phishing or malware delivery. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious PDF. No scripts were extracted from this sample.

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.cc/pify?keyword=flavonoids+anticancer+pdf
    • http://files.fieldstonepublishing.com/uploads/1/3/0/8/130873983/xitejo-jagekufiwepiri.pdf
    • http://files.5271kofc.com/uploads/1/3/0/9/130969695/9186048.pdf
    • http://files.hannahdarcy.com/uploads/1/3/1/3/131382141/d2f2f9.pdf
    • http://files.thesilvergen.com/uploads/1/3/1/4/131406843/c7722f9f97555.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/dezefanavevekofomusiwo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3254/1344/files/daxal.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/japepifosudupud.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/mutifusizugejakoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1607/files/xomawepafuwibesajoguvirod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/eva_perry_library.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/42807870955.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/talevusisolalilarifod.pdf
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/timafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6747/4087/files/43699587290.pdf
    • https://cdn.shopify.com/s/files/1/0436/9815/9769/files/80006449412.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifezunelavezide.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_off0000616e.bin
1395d64bec9ef81582eb08903062a198979c10106cdb67dfb867753caa18c0bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616E 5164 bytes
font_01_sfnt_off0000731b.bin
5f92382f0705e8eaae32b27b06ec703089795b4bce31377c37d0423a99ed5e56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731B 10424 bytes

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