Malicious PDF — malware analysis report

Static analysis result for SHA-256 776c4b03d8233ad4…

MALICIOUS

PDF

58.7 KB Created: 2020-08-22 03:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e589b99212031e4f60ac050704ef77f9 SHA-1: 5e81254f24b9e4c64913138821246234e9d65005 SHA-256: 776c4b03d8233ad433d011cc9eab263d1dccd92a30070b13a3f69b33e678af95
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to drive traffic to potentially harmful content. The embedded document body text, though garbled, contains the malicious URL and references to search results, suggesting a lure for phishing or malware. The ML classifier strongly flagged this PDF as malicious.

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=yahoo+answers+profile+search In PDF document text
    • http://files.kcriskselectors.org/uploads/1/3/1/4/131438571/2129812.pdfIn PDF document text
    • http://files.vandunet.com/uploads/1/3/1/8/131856108/4258465.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/17154961578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7146/5624/files/stepwise_regression_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6272/1688/files/backgammon_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/wuxere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/97824705294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5187/5481/files/visifubumoxumopegowad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3141/files/53701791311.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 1

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4B 3796 bytes
SHA-256: d0b4a05715f71ad27f7ab7c4c192243f6b28333a521a327bc9c311a43d90202e
font_01_sfnt_off00009ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC1 4864 bytes
SHA-256: f8882f77f20e119fd9785d9f93434d359d406154b27a1ebb5574f4bbfc650aef
font_02_sfnt_off0000ab45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB45 10756 bytes
SHA-256: d68b63ef49fca9c9c6d0af63e268755e9f0ce4731734ed5f3b8459f3884ab887
font_03_sfnt_off0000cfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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