Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f37878bbb9a037…

MALICIOUS

PDF

46.5 KB Created: 2020-08-11 21:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28735240582d6ac9ab716b9585c15af7 SHA-1: 4aac7a933aa1c6ce543b672247f2223055a4d908 SHA-256: b0f37878bbb9a0376279c12166d7b6c0e95493a93d73ecb2cda754417a48a4dc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Autodesk revit structure tutorials pdf' and the malicious URL, suggesting a lure. The presence of numerous embedded URLs, many pointing to Shopify, indicates a link farm strategy, likely to obscure the primary malicious destination. The ML classifier strongly supports the malicious verdict.

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=autodesk+revit+structure+tutorials+pdf In PDF document text
    • http://files.realty33nj.com/uploads/1/3/0/7/130775116/18d5fc8e8dbe8d9.pdfIn PDF document text
    • http://files.motherlodemontessori.org/uploads/1/3/1/4/131438274/rufebatoxinuseroj.pdfIn PDF document text
    • http://mavejirar.capstoneonline.com/uploads/1/3/1/6/131607240/0b770f08bf443fd.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/1/0431/8350/5570/files/gnr_one_in_a_million_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/bufoloregutawuvexova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/cmt_router_bits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/34938355483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/advanced_english_dictionary_and_thesaurus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/16676570482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/tifapapanakigetogixefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/sukudaresuxenibajakulije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7870/3511/files/45740692928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/bmw_warning_lights.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9579/1518/files/effects_of_youth_unemployment.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 5

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_off000076fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FB 5264 bytes
SHA-256: 41b4247d3daa79d1d9026a62a7fd68cb6755c4df6540a3cafb4b4a9df89fba43
font_01_sfnt_off000088fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FB 10456 bytes
SHA-256: a3c878f9cbabbbd7b585e32607bec6ad51b17b2586e43c094aac1c5237c2faac

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