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) First seen: 2026-05-08
MD5: 3f7b07ce760e67b7ec6a8f09f2bc3185 SHA-1: d5e27cba61a21b73c82536f6ce3ae9fcf7a70250 SHA-256: 660d9a083d13069b3fc205c2ff357e5ca63e77e079d443008e2ad02a457c7cb7
210 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to application forms and includes the malicious URL. The ML classifier strongly indicates maliciousness, and the presence of multiple SEO-linked PDFs suggests an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 In PDF document text
    • http://najogix.syracusehighnoon.com/uploads/1/3/1/3/131379803/sofivelupewajoroda.pdfIn PDF document text
    • http://files.martingtchorus.com/uploads/1/3/2/6/132681910/fd902fcf62d8e.pdfIn PDF document text
    • http://files.athenspassportmagazine.com/uploads/1/3/0/8/130873717/1595525.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/8533855642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0416/4256/files/72621051727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/67578190679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6315/6642/files/jizew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7680/2967/files/nice_guidelines_warfarin_dental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/sorerakavasabog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/messenger_not_from_app_store.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/8087/0040/files/bewars_movie_songs_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: athenspassportmagazine.com 3 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000501c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x501C 5236 bytes
SHA-256: f99714ac2fde3c559bde3ec91d8a812a6a5a646f8fd828f0b1bb33cf60b51ab9
font_01_sfnt_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 10160 bytes
SHA-256: 00c63595cdde4de944ccca3be01db3110ce8d7d7a25a7d51a5580b1f89b1626b

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