Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b85d829e263bca…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 01:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa1577ddb8d7c478ae926f6be19711e3 SHA-1: 0c72efec3b44b9e7a87aefaac596303213740a36 SHA-256: 18b85d829e263bca564b4a628d31584005594eeef529173e5c15febd4a122101
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently featuring a game-related keyword and pointing to a malicious redirector. The heuristic firings indicate the PDF is designed to redirect users to harmful infrastructure, likely as part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interest in game-related content to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.cc/wix?keyword=pokemon+emerald+nuzlocke+rom+ios
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5354/6656/files/job_interview_questions_and_answers_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/4829/4807/files/32214267879.pdf
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/42439365546.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/breath_of_fire_2_snes_rom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/panofumevijaduritopobuner.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/19441202673.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/projet_automatisme_industriels.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/tewagapexugasinojolobare.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/44763099364.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/pizewepakilevetameguruve.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/muwot.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac947309aaed413a945ce7c4bb124e90.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab918a06946b4d48873b31213d183f3a.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_off000058e3.bin
a74c4c1890bb6d154cfcab83cf8351ff9ac80653d50ffa69f7879bf68cdf3c62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E3 5000 bytes
font_01_sfnt_off000069bc.bin
e589c01a869d80a2a3bd28293e3e29a83e65ccda8b5e92e86d5836c2d5778266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BC 10128 bytes
font_02_sfnt_off00008c6d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6D 4324 bytes

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