Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b3b9c6e181401a…

MALICIOUS

PDF

44.8 KB Created: 2020-08-08 23:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e17950e92dd19cf08522d0a316957088 SHA-1: ad426f461c6adce576f97a66c530925105607591 SHA-256: 99b3b9c6e181401a90dd8662a09d29242998c78868378b79900603ed8df8c1d4
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content. 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.cc/pify?keyword=bowdichia+major+pdf In PDF document text
    • http://files.stumpysfabworks.com/uploads/1/3/1/6/131606011/86d8801f973.pdfIn PDF document text
    • http://sakita.jremarart.com/uploads/1/3/1/6/131606289/470416d065b8b.pdfIn PDF document text
    • http://files.japan-trademark-patent.com/uploads/1/3/0/7/130775371/vegixuniwab.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/1/0433/5347/3189/files/banemewemubejateg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/bunokalejavozamixok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/56210153362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/87409399416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/dedazazibuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/74403215964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/dosozegulosofelepubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/change_branch_name_git.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/13776580791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/pupodujejiwavusad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/31890005374.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 6

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_off000060a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 5404 bytes
SHA-256: 52b0de4e8a8ec4ff1cd7f327940833139cf86ab8bd50cfc21add3b2a536106d4
font_01_sfnt_off000072f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F6 16736 bytes
SHA-256: d874aec30f4643eeeb9eabd6c133f8cb6d8a4a4b0e634ce5e95ae7a7c1ee37ec

Open this report in the interactive analyzer, or submit your own file for analysis.