Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9bec4bb72bc1df…

MALICIOUS

PDF

46.3 KB Created: 2020-08-09 07:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 10bac99162e2ac3f02a3e002ea911468 SHA-1: 3cfaef76fe9d538a47db5e15b25e7560cc322071 SHA-256: 5b9bec4bb72bc1dfbb3ae37d42d59e1b45f5393c53243b5fa38073c2464a60eb
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, masquerading as a free download lure. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of redirector links for SEO phishing. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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=cours+de+l+anatomie+humaine+pdf In PDF document text
    • http://files.copperchiefstore.com/uploads/1/3/2/6/132682802/lanesiwanuza.pdfIn PDF document text
    • http://gilovogi.pdsummit.ca/uploads/1/3/0/8/130814328/zusovagoxomumof.pdfIn PDF document text
    • http://files.entotofoundation.org/uploads/1/3/1/4/131454986/c99c7462.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/1/0440/4235/4853/files/74240023501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6083/9078/files/length_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/xumogudelatonizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/onn_portable_charger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/jutoxeripavejabomavam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/49385048896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16481260084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tifomev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6151/7217/files/15067208951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/44475791700.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_off00007320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7320 5188 bytes
SHA-256: 58e0ca14a0ac524c6dc109b0a8c65dca0d74afd3b6482d9cb59b331b821f411b
font_01_sfnt_off00008494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8494 12176 bytes
SHA-256: f73a60bb1061eaa5b305020fab5a521f07c5528b98c76be87c24bca7382370e7

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