Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71140abf7692b06…

MALICIOUS

PDF

45.3 KB Created: 2020-08-10 10:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 590aeacd089f8ac044b220f8e38b6440 SHA-1: be1b656ea531f6f1bf9bfa8f95a0ab43b0e7df50 SHA-256: f71140abf7692b06da0b74be64a3add88c5f91fecbacf83bd5382b4ac3b29447
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 link farms for SEO manipulation or to distribute malicious content. One critical heuristic flagged a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=service+level+agreement+between+two+companies+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links hosted on various domains indicates a coordinated effort to spread 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.cc/pify?keyword=service+level+agreement+between+two+companies+pdf
    • http://zidanosab.greniereng.com/uploads/1/3/1/6/131606227/acd60fa.pdf
    • http://files.charlescityelectronics.com/uploads/1/3/1/1/131163960/rogafipovuxum.pdf
    • http://files.standrewspaisley.com/uploads/1/3/1/4/131437736/2088466.pdf
    • http://jazewanib.heartblendfm.com/uploads/1/3/0/7/130775162/xajafegiga.pdf
    • http://files.nataliereynoso.com/uploads/1/3/0/7/130739173/bebuwinujagus.pdf
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/gorarakafefinogivedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/73367927880.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/pezezoruketu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/56652725456.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/mupixirewuj.pdf
    • https://cdn.shopify.com/s/files/1/0444/3871/6583/files/ibps_clerk_exam_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/subtraction_with_regrouping_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/jezugap.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/how_to_get_your_pictures_on_notsobot.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_off0000700a.bin
56ae8432479e46d4e15aa0459e93cc3653d0d7d4dac33fa45988e45b7ed08144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700A 5868 bytes
font_01_sfnt_off000083fe.bin
1ebe698db5c6383f8cdadc488012df0a6e3f223caec6492719543d4cd6c8dd45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83FE 10564 bytes

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