Malicious PDF — malware analysis report

Static analysis result for SHA-256 7166f14a85f13589…

MALICIOUS

PDF

34.0 KB Created: 2020-08-11 21:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cb27eb8c9586c225726188057d613ad SHA-1: b33c5c708af02994d10473ffbf3f6cddd672be72 SHA-256: 7166f14a85f13589f5eccaa2ca371e011693fb55a7320b9084f75e7eb1ad0510
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a malicious intent to direct users to external content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL and references to downloading PDFs, supporting the lure tactic.

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.
  • 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.
  • 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/pify?keyword=convert+pdf+to+word+online+using+nitro In PDF document text
    • http://files.voltaglass.com/uploads/1/3/2/3/132303083/vipawoto_mogetoruf_lulopimig_pikazidon.pdfIn PDF document text
    • http://wagapew.catmintcottagestreetcatrescue.com.au/uploads/1/3/2/3/132303382/4431803.pdfIn PDF document text
    • http://files.vicentedelrio.net/uploads/1/3/1/3/131383283/segakup.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/1/0433/6726/8517/files/batopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/bwv_1006_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/nasibatiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/45624339728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2148/1622/files/zapogilegisej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/weteke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/wimubapimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6061/6599/files/15150006707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/13106906166.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

Related samples 4

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_off00004728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4728 5056 bytes
SHA-256: 8a4f5e4d2091a7c1b617bc91a0753f2492013e9af7a964c4f4e0239655333ec7
font_01_sfnt_off00005887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5887 10232 bytes
SHA-256: a776a69ea805ee418274ceb19e63b39d30c6ae591a15062e5bc608d52eedc0ae

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