Malicious PDF — malware analysis report

Static analysis result for SHA-256 93833567c521f66c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-03 23:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a981029b489e98fb393be6e24fb076 SHA-1: dbde7c2116b032a9b499389f1c315a9c012ec7dd SHA-256: 93833567c521f66cc4c887ab1c5aaf3a357640321825696057f2a9161a680608
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wb?keyword=transitional%20words%20and%20phrases%20pdf%20answers, which is likely intended to lure the user into clicking it. The presence of many links hosted on cdn.shopify.com, while some are marked benign, suggests a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=transitional%20words%20and%20phrases%20pdf%20answers
    • http://files.waltonsviewfarm.com/uploads/1/3/2/3/132303238/lodalep.pdf
    • http://files.demirandaguitar.com/uploads/1/3/1/8/131871690/fokodibavuf_zogovisum.pdf
    • http://files.willhumegames.co.uk/uploads/1/3/1/6/131607063/3329941.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekefokatonerosabiwifeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/9966/0194/files/42912060595.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/45169097307.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/gawumegusiritox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sagomowaroperovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/livanele.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/gelixesirebali.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/44727650388.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/tifogisozufesaxob.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/jivakavokefises.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/gunirazudenogaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/xofunalotefumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/39076799153.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/dark_cloud_weapon_guide.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_off00006618.bin
59c6de7436364d6a69c019e61699d8fd8e763b1b5a4f422c48a73a2842c16db3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6618 5168 bytes
font_01_sfnt_off000077b8.bin
43d774038ffc7a5d67e6a9d5db226dfb8f43926bc014008f07ad7016428cbc61
pdf-font-stream PDF embedded font (sfnt) at offset 0x77B8 10472 bytes