Malicious PDF — malware analysis report

Static analysis result for SHA-256 660d9a083d13069b…

MALICIOUS

PDF

36.2 KB Created: 2020-08-24 17:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f7b07ce760e67b7ec6a8f09f2bc3185 SHA-1: d5e27cba61a21b73c82536f6ce3ae9fcf7a70250 SHA-256: 660d9a083d13069b3fc205c2ff357e5ca63e77e079d443008e2ad02a457c7cb7
170 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=ibps+rrb+reprint+application+form, is flagged as a malicious redirector. The document body and heuristics indicate a lure related to an application form, combined with urgency, suggesting a phishing attempt. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination.

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.
  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=ibps+rrb+reprint+application+form
    • http://najogix.syracusehighnoon.com/uploads/1/3/1/3/131379803/sofivelupewajoroda.pdf
    • http://files.martingtchorus.com/uploads/1/3/2/6/132681910/fd902fcf62d8e.pdf
    • http://files.athenspassportmagazine.com/uploads/1/3/0/8/130873717/1595525.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/8533855642.pdf
    • https://cdn.shopify.com/s/files/1/0438/0416/4256/files/72621051727.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/67578190679.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6642/files/jizew.pdf
    • https://cdn.shopify.com/s/files/1/0437/7680/2967/files/nice_guidelines_warfarin_dental.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/sorerakavasabog.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/messenger_not_from_app_store.pdf
    • https://cdn.shopify.com/s/files/1/0454/8087/0040/files/bewars_movie_songs_free.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_off0000501c.bin
f99714ac2fde3c559bde3ec91d8a812a6a5a646f8fd828f0b1bb33cf60b51ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x501C 5236 bytes
font_01_sfnt_off000061c8.bin
00c63595cdde4de944ccca3be01db3110ce8d7d7a25a7d51a5580b1f89b1626b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 10160 bytes

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