Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb571f5a1ac698ae…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 04:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6ca10f78e4eb5a1706ea7bba9da8796 SHA-1: cf35d269e337c6ce1c5958802320fe150d949363 SHA-256: cb571f5a1ac698ae87a09525d58d8f0fcb7b8782ee53279df24382d17ecff43e
130 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, suggesting a phishing or scam attempt. The document body, though corrupted, contains keywords related to software keys and the malicious URL itself, reinforcing the lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick the user into clicking a link to download something potentially harmful.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=dvdvideosoft+premium+key+2017
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/63725429727.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/kamekizumexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/ponugefeji.pdf
    • https://cdn.shopify.com/s/files/1/0428/3029/9292/files/medical_fitness_certificate_format_for_job_word.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/38624287248.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/37538602503.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2432/files/sinataz.pdf
    • https://cdn.shopify.com/s/files/1/0458/6022/5177/files/zulokukewumopujojupe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/forrest_gump_opening_music_audio_fil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0803/1893/files/possessive_nouns_worksheet_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67264452348.pdf
    • https://static.usrfiles.com/ugd/0511f5_b1c66a812d0042fabca8678703f3b298.pdf
    • https://static.usrfiles.com/ugd/b8c837_33b5473b48854912a814f3597e7a1539.pdf
    • https://static.usrfiles.com/ugd/b8c837_21485fa6f9214a2188425a7cfd558307.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd080db55ec54f028f44cb67d5a5092d.pdf
    • https://static.usrfiles.com/ugd/08fe48_6188db9cfeac46b6a221e80587029522.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_off0000662e.bin
5f6ee40087091446e4c6f885141c674ef7771310204ab50cd5b18bd1f86413ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x662E 5576 bytes
font_01_sfnt_off0000793d.bin
c8599c3efe520dc58c93db6da8dba3b9f696203d5cef474932dab9574a3ad5e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 10400 bytes