Malicious PDF — malware analysis report

Static analysis result for SHA-256 f622af00289cfe35…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 14:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91413cbbb4a0026ad08b140579b37c94 SHA-1: e1ee47e869df50cedee2be783a88807f971607ee SHA-256: f622af00289cfe354ff80662f001bb032f70177f5fdad98df0ddb23cf2804973
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=black+dog+bipolar+self+test+pdf`. It also exhibits characteristics of a PDF link farm, with numerous embedded links to various Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for a self-test, likely to disguise malicious activity.

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=black+dog+bipolar+self+test+pdf
    • http://files.hcnewyork.com/uploads/1/3/2/7/132740267/4a8c602b3c9.pdf
    • http://files.xiphospress.com/uploads/1/3/0/8/130814466/fuvag-jolumosufobib-sobibijaretuvi-wegugunujati.pdf
    • http://files.rubiniart.com/uploads/1/3/1/3/131382092/wufakomigebajik-nagudukodisosaz-kosipuvuno.pdf
    • http://lovafe.fourmonkeysboutique.com/uploads/1/3/0/8/130814328/6043496.pdf
    • http://files.pinegrovecogop.org/uploads/1/3/0/8/130874318/de351d21ce3806f.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/accuweather_arlington_va.pdf
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/casella_berger_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/calendario_serie_a_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3052/5590/files/ac_dc_thunderstruck_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/98746171180.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/sidazojanare.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/pile_of_shit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/6369044750.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/4729434684.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_off0000654c.bin
97fd8a4b8b4ba279e6c620750bb1be68d3aec40b943516738161eb06317cd1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 5576 bytes
font_01_sfnt_off00007849.bin
d3aa97ef1130f29697c4fdba794b1ccd6c60d66dbbada6ee0b616d74e5bca1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7849 9872 bytes

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