Malicious PDF — malware analysis report

Static analysis result for SHA-256 8612f6bb6d171e8a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-02 05:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 599999519e8a955c418aac87846544b9 SHA-1: 343e3596668b13e69acf7934dd62834f5e3b2a1a SHA-256: 8612f6bb6d171e8a70f1db8e6f23946adca021da49e6ecf538771087723531bc
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=university+calculus+3rd+edition+pdf', which is likely the initial lure. The presence of a large number of external PDF links, as flagged by PDF_SEO_LINK_FARM, suggests a link farm or SEO poisoning tactic to distribute 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.ru/pify?keyword=university+calculus+3rd+edition+pdf
    • http://files.laverdasthoughtsandmemories.org/uploads/1/3/0/7/130775837/liwawo.pdf
    • http://files.plymouthcantoncivitans.com/uploads/1/3/1/4/131408899/revugebezevomatiluf.pdf
    • http://files.nanoteacher.org/uploads/1/3/2/6/132695476/babudaladojevafi.pdf
    • http://files.jamiehillman.net/uploads/1/3/2/6/132681767/5389850.pdf
    • http://files.kingofglorytabernacle.org/uploads/1/3/1/6/131606056/3506055.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/27674151968.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2978/files/wawipadisitulijaxujoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/6014087622.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/laropupidevubabafop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/87062594468.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/10246672475.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/justified_season_4_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/divizosiwisofifefamuma.pdf
    • https://cdn.shopify.com/s/files/1/0438/2785/5517/files/depoderizukuvuzepukoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.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_off00006fd2.bin
278488263b57fcb0e9142dac32b0c99ab42f4cb78d4df73204597b85d12befec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD2 5464 bytes
font_01_sfnt_off0000828e.bin
c4645e482efcfc606c5ba52396fbc479e29a1544051ccfad62b06a19479f1252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 10356 bytes

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