Malicious PDF — malware analysis report

Static analysis result for SHA-256 394a4a0917c0ea01…

MALICIOUS

PDF

41.2 KB Created: 2020-08-16 11:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18968e5a60148cf1b8a46f46b0c9392b SHA-1: 641935091c5f611fd395b35188e789a6f1fed46c SHA-256: 394a4a0917c0ea01467c8601b83ce3179e18ab07b0bc899fe91b5ba6a76916fc
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a link farm with numerous external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content. The primary malicious URL identified is ttraff.com, which is likely used for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=total+war+attila+guide+franks In PDF document text
    • http://files.mtcdjservice.com/uploads/1/3/0/9/130969897/zudoxupe.pdfIn PDF document text
    • http://wuveli.sarahhawkyard.com/uploads/1/3/2/3/132303382/dukaxikememepijagiz.pdfIn PDF document text
    • http://files.ukprestigeproducts.com/uploads/1/3/0/7/130775331/ralapowob.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/1/0436/2970/7422/files/nutuxapamerixinuzewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/60131799813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/statistical_reinforcement_learning_modern_machine_learning_approaches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8360/0806/files/regimento_de_assembleia_nacional_popular_da_guine_bissau.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/aluminium_partition_construction_details.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/amplictil_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/xufilixomasojur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/78202203813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6315/5615/files/verbal_reasoning_aptitude_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/booty_workout_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/sokubagatuwosiwadem.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_off000062de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DE 5180 bytes
SHA-256: da8cd7380bb21906f8b6f9f5c7cf9cef0063c9567a615adb4036e0b7df32002b
font_01_sfnt_off0000749e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749E 10380 bytes
SHA-256: ee5cc38aeea148a2e7452988b1b80959e63029cfb70b58d9dc60bd34e9b53bc5

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