Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a4068f3572964c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-26 15:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90a881b64c7f8d2d5d14f6adfb079634 SHA-1: 0324179dd8b030bc2d3710f295d5c1a43d4fdc20 SHA-256: 90a4068f3572964c28d1b33c081c26ee691c9f5a4a8eefcdae0f19dc6f913865
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used in SEO link farms to manipulate search rankings or distribute malicious content. One of the primary links, 'https://ttraff.club/pify?keyword=um+corpo+de+massa+m+choca-se+frontal', points to known malicious redirector infrastructure. The document body contains garbled text and embedded URLs, further supporting the attack pattern of a link farm designed to redirect users to potentially harmful sites.

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.club/pify?keyword=um+corpo+de+massa+m+choca-se+frontal
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • http://files.fisherexperience.com/uploads/1/3/0/7/130740068/pifav_fowuk_fezimegifis.pdf
    • https://cdn.shopify.com/s/files/1/0458/0809/1302/files/wow_classic_leveling_guide_horde_addon.pdf
    • https://cdn.shopify.com/s/files/1/0445/1778/5759/files/pearson_algebra_1_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/87153027701.pdf
    • https://cdn.shopify.com/s/files/1/0434/0177/3212/files/baofeng_bf_f8hp_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/50697784180.pdf
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/62837936299.pdf
    • https://cdn.shopify.com/s/files/1/0441/0481/0648/files/86172162556.pdf
    • https://cdn.shopify.com/s/files/1/0437/1300/3674/files/mufewidelopitufe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/adobe_illustrator_convert_to_vector.pdf
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/dixesivapiforab.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_off000054ff.bin
a96e55b9eed75040b30aebc3130137e65e711f76b0328bda6cd793ccf1deb954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54FF 5416 bytes
font_01_sfnt_off00006744.bin
cf55b792ff331fb7c82a4e2823d2c8b45f84763da3cca32170970c19f5c63048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6744 16016 bytes

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