Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6111d36df6a72f…

MALICIOUS

PDF

45.5 KB Created: 2020-08-04 17:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c203f7b784a3205ae462418ccce87c3 SHA-1: ed1f1fb302314fbd2495d94a241f293b5ce9eaf4 SHA-256: 3a6111d36df6a72fb410ce39adcae53b706c870b2f80ac4f75c9a5473c4a591c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, many of which point to a redirector service designed to obscure the final malicious destination. The heuristic firings indicate the PDF is a redirector link and part of a link farm, likely intended for SEO poisoning to lure victims. 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.ru/pify?keyword=payroll+system+proposal+pdf In PDF document text
    • http://files.timkentart.com/uploads/1/3/2/6/132681156/jabijonunasade.pdfIn PDF document text
    • http://files.bonding.no/uploads/1/3/1/6/131637606/1860893.pdfIn PDF document text
    • http://files.wisdellshomes.com/uploads/1/3/1/3/131379615/xifusago.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/1/0434/7274/8710/files/tobebirumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/buviwapejazukepupelakaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/bajexipefapefinamow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/27004430435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/dijolokifusajubijevediz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/8441582558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/dilatezesesam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3727/5813/files/55523592454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/35082004272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/15757787017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7827/8550/files/26402350650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/84122074114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/22591291493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/85085796267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/22988310671.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_off00007301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 5288 bytes
SHA-256: 733092fccaa12a142dc07208e7c66a88b9d42b177eea47c0d6f1b8cd0e8f37aa
font_01_sfnt_off000084f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F3 10536 bytes
SHA-256: b174f9955cc3e5a51d956c07d6c101832a7ef8d6d450840cc303ecd40bdb59b5

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