Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d23c404f57d93be…

MALICIOUS

PDF

39.9 KB Created: 2020-08-14 23:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8c431d556c6aa3628bbedc62be5fd66 SHA-1: ca49b4ba16ae1719908bea93e79231884f5c4011 SHA-256: 1d23c404f57d93bec5123bf030a3594c98637befe2f88891637b35b4ebd674f9
194 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous Shopify-hosted PDFs, with one primary link redirecting through ttraff.com. This indicates a likely SEO poisoning or phishing campaign designed to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=blackbird+tab+pdf In PDF document text
    • http://files.wilmingtonprintandmail.com/uploads/1/3/1/6/131637057/cd8bc305482.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/1/0428/4570/0262/files/tebobipoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/vikojofofar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/voxonoxasewab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/accounting_concepts_and_conventions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4948/3420/files/54634360107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasukeseduvemuledup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/55662966123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/fakajutaxisowuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/zinorumijopavagutunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/pdf_of_a_beta_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/87518320974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2503/1590/files/pisudexijedududer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/mathematics_books_for_class_8.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_off0000560b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x560B 5224 bytes
SHA-256: dc44b5774c960fba72faeedec82aa2ba15ab5bfe7695286f0dfd965f03dfaf5e
font_01_sfnt_off000067db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DB 13760 bytes
SHA-256: 6f80e654a44a23a37de2484f27e0845b7929d777b7728c69285d881d20d63d0d

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