Malicious PDF — malware analysis report

Static analysis result for SHA-256 785a23a4d81f427e…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 20:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbd4f521da0bd52a0c73a8727f7681fe SHA-1: dc88ec9866eec865097e0e4926ac8d48f9d5d455 SHA-256: 785a23a4d81f427e0028190da0c47cd7edf075ebe4fbde517149d55a61bc68cd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to redirector infrastructure like 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, contains the same lure text and URLs, suggesting a phishing attempt disguised as a free download. The ML classifier also strongly indicated maliciousness.

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=honeywell+thermostat+app In PDF document text
    • http://files.isiscommunitytheatre.com/uploads/1/3/1/4/131438682/nodofurixug.pdfIn PDF document text
    • http://files.wicklowart.com/uploads/1/3/0/9/130968956/mikudox-zutotep-lulamubeg.pdfIn PDF document text
    • http://dekafen.rqgenesis.co/uploads/1/3/2/6/132681394/benonufiniratigelon.pdfIn PDF document text
    • http://files.embracemyanmar.com/uploads/1/3/0/8/130814411/koludulasamora-bujozejon-tuvorim.pdfIn PDF document text
    • http://files.helenmathermusic.com/uploads/1/3/0/7/130740625/kesixokibarajab-vorogasen-divinemudek-fudixuliku.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/1/0447/1426/2682/files/bhojpuri_gana_2019_ka_ing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8353/0394/files/dibaviranadadafulikowuwaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/74625178182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6661/2119/files/agile_development_model.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/98013423145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/23402310184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/p90x_workout_book.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 7

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_off0000650b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650B 5212 bytes
SHA-256: aea958d5000fa6749cb96fdeba7eeaf47fadfcd8043c9a6aa4bfe03e8a7e319f
font_01_sfnt_off000076a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A9 10604 bytes
SHA-256: 999d44e97f75e045553e3da11018a9dcf6421bd009ddeb6b9b372527ddf4d499

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