Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee88cee18c2ccde…

MALICIOUS

PDF

50.1 KB Created: 2020-08-14 13:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a7ce59f249af218e663356fd43b347d SHA-1: 6ce3119d4846ad496af8d95cc8b72c6ae04a198c SHA-256: 0ee88cee18c2ccde6c71eb6d4f22b97212cbb9f02e04b615ed638cd4ca9dbf3b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a link farm and includes a lure for a password-protected archive, suggesting an attempt to bypass security controls. The embedded URL is likely intended to lead the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=stockholders+equity+balance+sheet+treasury+stock
    • http://files.panisangelicuspress.com/uploads/1/3/1/3/131384018/7094245.pdf
    • http://vovowi.kabirchopra.com/uploads/1/3/0/7/130739423/42d0fd1.pdf
    • http://vebakam.delightfullyfit.org/uploads/1/3/1/8/131856772/2711c.pdf
    • http://files.creasyspeaks.com/uploads/1/3/0/7/130776611/4608269.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/dupesotopurofukomadiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40814320730.pdf
    • https://cdn.shopify.com/s/files/1/0444/2321/7318/files/ap_1_target.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/robot_actuators_and_feedback_components.pdf
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/jazikumizukewe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/gigimasefasuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/60994750534.pdf
    • https://cdn.shopify.com/s/files/1/0450/1677/6868/files/firig.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/20862096301.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/47357659115.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/sifegujuvanef.pdf
    • https://cdn.shopify.com/s/files/1/0438/2071/2098/files/23482692213.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000848a.bin
7def42a8ab441cf0ebd48f880257c1f5d01ea85cf571f4a5be5d51a50c195bc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x848A 5560 bytes
font_01_sfnt_off0000975d.bin
4e83de8b9413ffa2556eb3aa35838873e480e932b896077222af356add5cea2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975D 10376 bytes

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