Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6a5275a3bc51a2…

MALICIOUS

PDF

51.1 KB Created: 2020-08-26 14:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 463e4407a5a5088fad922f8e8eff200a SHA-1: 59911126960800537a334a07318e255a1f6b0e72 SHA-256: cf6a5275a3bc51a2b941528ec1c274e4c6cd45374d6af6b0708447c188e41cea
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 the presence of a large number of embedded links, a technique often used to redirect users to malicious sites. One critical heuristic flagged a link to a known malicious redirector, ttraff.cc. Another heuristic identified a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host malicious content. The document body contains garbled text and a URL that matches the redirector, suggesting an attempt to obscure the malicious intent.

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=dospel%25C3%25BDch+tabu+pr%25C3%25ADbehy
    • http://kaxevegik.intersoftsystems.com/uploads/1/3/0/7/130776366/3099153.pdf
    • http://zewumib.palmettoeap.com/uploads/1/3/0/8/130874457/7912516.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/nuluxeso.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/black_eyed_peas_discography_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/cuales_son_los_antibioticos_de_amplio_espectro.pdf
    • https://cdn.shopify.com/s/files/1/0431/7433/0517/files/vawarojiwenogomopajibofad.pdf
    • https://cdn.shopify.com/s/files/1/0439/8029/2254/files/tumor_carcinoide_de_intestino_delgado.pdf
    • https://cdn.shopify.com/s/files/1/0433/7667/2918/files/mortal_kombat_rom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4828/files/61675588371.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/arjun_classes_physics_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/sagijavejesekenijidewuwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/80459368802.pdf
    • https://cdn.shopify.com/s/files/1/0436/6080/4249/files/ielts_academic_writing_task_2_sample_answer_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/option_file_pes_2017_smoke_patch.pdf
    • https://cdn.shopify.com/s/files/1/0433/3951/4006/files/astronomy_merit_badge.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/7409497321.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.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_off0000857c.bin
59311c6c4646e81deaa4c3545f01e68fe9e833c6f793ded187a83f27af5d5cb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x857C 5440 bytes
font_01_sfnt_off000097c7.bin
fdcff12f90f11d4af150565dad7e013963def3a7bbabc366f582db1ab231de2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x97C7 12936 bytes