Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0ca9a355936d2d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-02 17:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30ef8a5eb9476f390ebc3df833d098f1 SHA-1: 88709ce4c58daa517d012804872b4c499b314f83 SHA-256: 1c0ca9a355936d2d8d6cb7f893a8a594cd74abb3f72fc34c8de7797374111690
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely designed to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm points to a delivery mechanism for further malicious content.

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=tonight+enrique+iglesias In PDF document text
    • http://files.detoxnaturalliving.com/uploads/1/3/1/1/131163846/xeloxotu.pdfIn PDF document text
    • http://files.williamstonfoodbank.org/uploads/1/3/1/8/131871416/3855337.pdfIn PDF document text
    • http://files.delorenzotimes.org/uploads/1/3/0/7/130776462/ketoxima.pdfIn PDF document text
    • http://files.reallywildadventures.co.uk/uploads/1/3/1/4/131453056/namufamedutegojefaf.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/1/0439/5863/2606/files/wesikitusaxinadebin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/14130078060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/maxukegekavet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/10809647467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/xibifoniwixegofali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/68535492398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/sirizuguvix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/43185107568.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_off00005e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E02 5020 bytes
SHA-256: 12a4da2de93c88f688d69b2939458a349bed65e7f56a88700fe8749e6c654820
font_01_sfnt_off00006f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0C 12624 bytes
SHA-256: fae9febaa6d7ab1fbb4a1cce908ee7fb5f54cbb7c1606cef1e722d4fe3efcfa9

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