Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3ff331d893d94a…

MALICIOUS

PDF

46.1 KB Created: 2020-07-26 23:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8765c02a129ef7561cf19fbd77866859 SHA-1: dc45efd440c7dc795e0985ed3e7ffc627ff1c177 SHA-256: 6f3ff331d893d94ab74853728b4b09347c45f38911b1168966cc762f1f439ff1
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector to a known malicious domain. The document body, though heavily obfuscated, appears to be a lure for a 'tutorial PDF'. The ML classifier strongly indicates maliciousness. The primary attack vector is likely spearphishing, leading to a malicious redirector.

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.com/wb?keyword=ug%20nx%2011%20cam%20tutorial%20pdf In PDF document text
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdfIn PDF document text
    • http://files.anilani.com/uploads/1/3/1/4/131438456/ee2ae2.pdfIn PDF document text
    • http://files.emmamurphyrecorders.org/uploads/1/3/0/9/130969334/7696175.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/1/0427/6482/8838/files/5167504596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/vosisafinokixokopotoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/80897775521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/99371353032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3352/5400/files/62352496622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/34696429674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/sivax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0062/6341/files/79051361590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/kebudevagixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/15817528018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3309/9430/files/86266087009.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 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_off000076d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D9 5172 bytes
SHA-256: 8cf7ffbed38042c983c250d03a009da461e48f2bed6720c477c01f4d1473419a
font_01_sfnt_off00008858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8858 10244 bytes
SHA-256: 242001f279e4c4819229c6ad0b372cbf4d17312665ae78427486734975947b82

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