Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38a6078928a4c20…

MALICIOUS

PDF

42.8 KB Created: 2020-08-09 07:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d5bde27b5bd692107cb35ef38a75003 SHA-1: 6dbb2259c398f82785ce2719876e92ca9e23f33c SHA-256: c38a6078928a4c20a541e0c381f0af3174cf697abf31b55602ca5b02ae5885d6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, many of which point to external resources. One critical heuristic identified a malicious redirector link, suggesting the primary purpose is to lead users to harmful content. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm.

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=adjectives+worksheets+for+grade+6+with+answers+pdf In PDF document text
    • http://files.worldwidecycles.com/uploads/1/3/2/7/132740805/zejek.pdfIn PDF document text
    • http://files.snotogo.net/uploads/1/3/1/8/131856549/papepeb.pdfIn PDF document text
    • http://files.jtmcreativedesigns.com/uploads/1/3/0/7/130739463/vitagetol-xakosonorijen-getesukodo-sajavizes.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/1/0430/7176/6690/files/43872610053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90675932679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4469/0337/files/ziviwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/38798421039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/pitidutiwotorokifub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/a_legacy_of_spies_john_le_carre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/46504827866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2411/4076/files/33519063636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/pewutulekibujivof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9436/8671/files/parthian_coins.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 5

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_off00005c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 5820 bytes
SHA-256: a46a0a11da00ad1fcc7902c88c8f9286e9d1029a10f840da49cfb84236fdc940
font_01_sfnt_off0000704e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704E 14668 bytes
SHA-256: 9bf855e4295638f91524174d0320f7ed802d580211dbe3d052690988c0943fe8

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