Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9591612bce11b0b…

MALICIOUS

PDF

67.1 KB Created: 2020-08-19 14:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 279b337117dd8e3f832ad8ae4c87665d SHA-1: 52c434a996d68a9efaf8ef35b993a8738b73eecb SHA-256: f9591612bce11b0b2b4bbc0ea987be65922c60be796e8fd6e2b347ef6ce43158
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of external 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=gigantiform+cementoma+dysplasia In PDF document text
    • http://files.everlastinglovechurch.org/uploads/1/3/1/6/131607522/e6e1aae7.pdfIn PDF document text
    • http://zexir.courvoisiercentre.com/uploads/1/3/1/0/131070581/ximidizewepub-zitisuj-konidewu.pdfIn PDF document text
    • http://files.childrensbreadministriesinc.org/uploads/1/3/1/4/131414743/b25809a1f003.pdfIn PDF document text
    • http://files.oneactioncalendar.org/uploads/1/3/1/3/131383959/5887307.pdfIn PDF document text
    • http://files.hotrodtrailersales.com/uploads/1/3/0/7/130775221/dd53d788cf00d08.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/1/0435/2573/4552/files/51857332084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/44075870911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/dafum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/19078218921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/50903783600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/99077727726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4496/1446/files/91223177475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9906/8318/files/sobubegejoreritid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0804/9830/files/dotigikijujezokuxogu.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_off0000c909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC909 5608 bytes
SHA-256: 44b4d4d71c7276e7c216703cf59747d797d3b28d10a15a466cc10c92817d1a39
font_01_sfnt_off0000dc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC12 10424 bytes
SHA-256: 171188fa22e7ebb5b999003da38f2564b09f27ebf2d69620671318b99dee3fc9

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