Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7db6047cb0fbafc…

MALICIOUS

PDF

44.4 KB Created: 2020-08-07 21:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c6e227a271dcc3ece34ff01b6eea6e8 SHA-1: 079930f8d8edf66f2dbb04aad62e003b57cd3c41 SHA-256: e7db6047cb0fbafcadb8ef657081605621dc56b12293f212ec842f32fc0bfb89
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure under the guise of providing a free PDF download. The primary malicious URL identified is https://ttraff.ru/pify?keyword=understanding+the+linux+kernel+pdf+free+download.

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=understanding+the+linux+kernel+pdf+free+download
    • http://files.dianefelicejewelry.com/uploads/1/3/1/0/131070895/2667407.pdf
    • http://zajekuwum.lk-dance.com/uploads/1/3/0/8/130874064/2058716.pdf
    • http://files.ourladysyork.org.uk/uploads/1/3/0/7/130738550/3e88fa4dfa4216.pdf
    • http://files.internationalpsychologyandhealing.com/uploads/1/3/0/9/130969811/716190.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.pdf
    • https://cdn.shopify.com/s/files/1/0436/4481/3470/files/9743216237.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/gisodakat.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/kuziboraxisiborogub.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/bonusheft_tk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/46503468900.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/asus_rog_strix_z390_f_gaming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/mekopajipaputusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/bel_ami_maupassant_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/civic_education_syllabus.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_off00006fa9.bin
cd6a5d5839bf30cf3b4859bee56e89ac8ec0ed906f2f9555d5da4fad25df6552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA9 5520 bytes
font_01_sfnt_off00008284.bin
faea186e19ea6e100e32c0524cacd83296779ef64a1f59d893dca6001173434b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8284 10012 bytes

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