Malicious PDF — malware analysis report

Static analysis result for SHA-256 8126c3b2227ff55b…

MALICIOUS

PDF

38.8 KB Created: 2020-08-17 03:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3237324a803ca8887be845ae56174b7 SHA-1: e3f8b06d724d586ed021eec5f4c694a32aa3e51f SHA-256: 8126c3b2227ff55b76c2b64bc2238a1c30f78c3893f0745603d57826fdc4de5c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics, suggesting an attempt to trick users into downloading potentially malicious content. The ML classifier also strongly indicated maliciousness.

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=mother%2527+s+day+worksheets+activities In PDF document text
    • http://files.marymartinharper.com/uploads/1/3/2/7/132741535/mixatojakatofer_jajodisa_vawokibexusef.pdfIn PDF document text
    • http://files.decktuneuprapidcity.com/uploads/1/3/0/8/130874090/zamar-subuwumo-vixuv-runob.pdfIn PDF document text
    • http://files.pjeterkoleci.com/uploads/1/3/2/6/132681938/f414f68e3faf.pdfIn PDF document text
    • http://xafoju.somalimuseum.org/uploads/1/3/2/7/132710621/nalega_wemegok_sodusituniwag.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/1/0429/4279/1839/files/akiyoshi_rikako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/bigukeguri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/66579304717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/kamus_terjemahan_arab_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/wafuwupuxoxarivujeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/5580397310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/organon_aristotle_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/jozozarubazunajegadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/tosuzapijaxezokisin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8067/8564/files/fumadekanuwer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/didulujudikuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bekikelazipilexujewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/repudobulumexemid.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_off000059bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BD 5352 bytes
SHA-256: 973e70be380dec2d24318e5a67ea6a519c24379a39a995c842f4d0025e9f72b8
font_01_sfnt_off00006c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C16 9936 bytes
SHA-256: 3a2d6cb0c62d32838dfcf298f7df142701dbe7fcb61658e5df9bde1a1e30fa7a

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