Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe27be761165b05…

MALICIOUS

PDF

45.7 KB Created: 2020-07-28 22:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b6ab0ff982e8c46abe4eb4dee1084ef SHA-1: 27469ff08732c571a72b226f8657bbeaaeef5d64 SHA-256: 6fe27be761165b053688c02aeddf4c2d80b096da5e482f197ce53918139d797f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'Consumer reports best small suv 2020'. The presence of many external PDF links suggests a link farm or SEO spamming operation, potentially leading to phishing or malware distribution.

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.ru/pify?keyword=consumer+reports+best+small+suv+2020
    • http://files.sandcastletreasures.com/uploads/1/3/2/8/132814958/xujuzobifenekosi.pdf
    • http://files.nikkosbread.com/uploads/1/3/0/7/130775649/magatuj_ribuwuvojiwim.pdf
    • http://files.augustdulcimerdaze.com/uploads/1/3/1/4/131453946/d0bc4.pdf
    • http://files.cantonohiolandscaping.com/uploads/1/3/1/4/131453651/453c43f3.pdf
    • http://files.harryvoltori.com/uploads/1/3/0/7/130738785/0e81add.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/nuvijoperuvazefopow.pdf
    • https://cdn.shopify.com/s/files/1/0436/4068/4697/files/bugupidimewejuzukukeravej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/tubute.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/makebajubajamakifof.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/xipefapimelibuguvibajunew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/japevifamufonawe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1809/9615/files/40502486628.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pobilimej.pdf
    • https://cdn.shopify.com/s/files/1/0433/4154/5626/files/mekodafunaxumenuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/526428265.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/44481186307.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7746/files/gezufolobagafepanobaguxo.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_off00007474.bin
09cad37dd41c60ce88b932fcb82ab057376ca6d7f856624043ef39d5ffca3519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7474 5296 bytes
font_01_sfnt_off00008659.bin
23154582bdd51d31131174ad652d321013aaf8ab0d8929028b774bd524e99944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8659 10180 bytes

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