Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a934c150d7323ad…

MALICIOUS

PDF

40.6 KB Created: 2020-08-08 07:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e5a1fa98478db63323bf822dd51359f4 SHA-1: 4a239b1cf135edb1264e42ccc2a38294fe8b4c3e SHA-256: 1a934c150d7323ad2362e86b37cfac406405380e5aff84b5d20065ac31ce9de0
194 Risk Score

Malware Insights

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

The PDF contains a high density of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to obscure malicious destinations. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=mean+value+theorem+problems+pdf In PDF document text
    • http://files.villagegallerync.com/uploads/1/3/2/6/132695575/34f3c70c16.pdfIn PDF document text
    • http://files.bigbreaknation.org/uploads/1/3/0/7/130739783/bemusuwuxeravaf.pdfIn PDF document text
    • http://files.djasonbishop.com/uploads/1/3/1/4/131452811/kojubobi.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/1/0432/2911/8627/files/fapilegevaralokafelewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7084/9177/files/25245301361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/5950126401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/23513741144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/lugenetesufesukomekevofed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/mikuni_carburetor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4349/5842/files/transistor_amplifier_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/functionalist_theory_of_religion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/72766969459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/polatelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/88563835022.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 4

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_off00005f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F68 5484 bytes
SHA-256: 01a6b362df98a38dc7e342c10444dd24d5bf02bd7067e18fa613743e07945f86
font_01_sfnt_off000071e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E9 10476 bytes
SHA-256: 480547af51816a91d136a69fd53d445deed09e273641de430ecc74c6ffde3960

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