Malicious PDF — malware analysis report

Static analysis result for SHA-256 6652fc463862b175…

MALICIOUS

PDF

46.1 KB Created: 2020-07-25 16:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e730580caf1b694b53ebae0feba764ec SHA-1: 59d6f428575ad94f3d05c01c0695197a9cd00ec5 SHA-256: 6652fc463862b17510d6cbc695ebb571d3cf337026a3aad98af002f50f457772
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to distribute malicious content. The 'SE_URGENCY_LURE' heuristic further supports the phishing pretext by indicating urgency language within the document.

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=kahoot+it+free
    • http://files.elizabethmariephoto.com/uploads/1/3/0/7/130775953/911b0c3e0c09.pdf
    • http://files.southcarolinapac.org/uploads/1/3/1/3/131380001/nifif.pdf
    • http://files.usapathwaytomathematics.com/uploads/1/3/1/4/131452783/6138796.pdf
    • http://files.macbrothersgourmetfoods.com/uploads/1/3/2/6/132680986/sigesekitaxu_kepijanetuxasi.pdf
    • http://files.lindsayplouffe.com/uploads/1/3/1/4/131454216/sabobikini_julixadofu_vozagati_buzejibu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/94472968341.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/24936860345.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/4620451447.pdf
    • https://cdn.shopify.com/s/files/1/0438/9021/3019/files/89682564287.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/81615402910.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3467/files/98783453408.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/xizejikifebupodurosebod.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/zaxemubojeregusulep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0437/7657/3601/files/68735097465.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/wetovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/gitinewuvatewozelawixarit.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/19357320343.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_off000078a3.bin
73b403a5b30afb390c6276fb5683d7b375da304c6c4e13e91f63b584fe54fd3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 4296 bytes
font_01_sfnt_off0000874f.bin
a0a80e951d3d7ac55a42b5c2baa354e8298d29719834b071dd4fb89a3db06cb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x874F 10576 bytes

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