Malicious PDF — malware analysis report

Static analysis result for SHA-256 18250409f252d032…

MALICIOUS

PDF

52.5 KB Created: 2020-08-04 06:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 090d8cac80d2d08a59bf81e7f6ee0ca2 SHA-1: 22ee5fbf3e6f942504c0e3f28a21528eb5bec436 SHA-256: 18250409f252d032aa9d1bd7d9b8796d555bf82fc305a1f351435ec34b0e3154
162 Risk Score

Malware Insights

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

This PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.ru/pify?keyword=alphago+zero+pdf'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'alphago zero pdf'. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, likely intended to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=alphago+zero+pdf
    • http://kapon.emergingchristians.com/uploads/1/3/2/6/132696021/vesedumira.pdf
    • http://files.thelivingroomprojects.com/uploads/1/3/1/0/131070450/biwede_nesenisanexo_ligamujik.pdf
    • http://bugajadi.fatfueledfanatic.com/uploads/1/3/0/8/130813866/zudajubi_viwutinurubarub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/lenukakupidawipufozevuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/1333/3411/files/82517677108.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/80645340748.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/kujuved.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6384338271.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/82076694997.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/xoguvifegadobegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/xugafatu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/41180807993.pdf
    • https://cdn.shopify.com/s/files/1/0429/8738/9087/files/balesiwusotemunidawowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/58362386982.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007376.bin
813eeb0bd5ee00c95192a38f8ce55766255459f8b7df9bb642498e11445dd79a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7376 8420 bytes
font_01_sfnt_off00008f9d.bin
82dafa2aef4fc4773f81fe4ac9684ff206d57a6e4b7519d0dd1c5883bee1d4c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9D 5164 bytes
font_02_sfnt_off0000a132.bin
b4e3437d0a3027f623152d398598ef4356a5cf25b82e44617f68d3d105915e28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA132 10308 bytes

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