Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a80fdb0e131118…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 21:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 382f520ac9e9fedb1c87a51d2b42c8be SHA-1: f24b06e51fae3782a7ba5d097d24da4d57e74a16 SHA-256: 38a80fdb0e131118bad30629c9a8ad24fd789af21181990080219529cfb137a9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a direct link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily corrupted, contains text related to 'printable behavior charts' and the malicious URL, reinforcing the lure. 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.com/pify?keyword=printable+behavior+charts+for+home+pdf In PDF document text
    • http://files.cvhsaa.org/uploads/1/3/2/6/132695530/8e5ab028b0.pdfIn PDF document text
    • http://files.nativetwiststudio.com/uploads/1/3/2/7/132712063/nividosigukeletapub.pdfIn PDF document text
    • http://bijini.catherinemmsmith.com/uploads/1/3/1/3/131379578/2081571.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/1/0431/4244/7265/files/mafosepipiwapogafasofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/bossypants_photos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/viryual_girl_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/dugepilusezezatugizab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/phases_of_ontogenetic_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/pixelmon_ring_target.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/wivuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/korojuxepijevamofakunupul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8024/5657/files/86354604741.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_off000061b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B2 5596 bytes
SHA-256: cf9f4225b65be8cc4574b4048b27fd07eb179b14620b5b1e630bd52446a85b4c
font_01_sfnt_off0000748f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748F 10012 bytes
SHA-256: 15cde19f83abb6fb4ef257e4d777df977d0807f039647535734f26765f9399e7

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