Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b471503613b40d7…

MALICIOUS

PDF

46.1 KB Created: 2020-08-01 12:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 604f4a2c97a034e8a5b50a73f9db081b SHA-1: a0a3be0356f3931c8a5087e7b5708f4c283905bc SHA-256: 0b471503613b40d735dc24d34d4b7bf807e79f3ece741a71022dd3a1a456f943
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service, suggesting a link farm or phishing attempt. The document body and embedded links reference 'Python timeit decorator', likely a lure to disguise the malicious intent. The ML classifier strongly indicated maliciousness, and the PDF structure with multiple external links aligns with SEO spam or phishing tactics.

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.ru/pify?keyword=python+timeit+decorator In PDF document text
    • http://files.jeffreytbaker.com/uploads/1/3/1/4/131438024/51c05280.pdfIn PDF document text
    • http://files.wendymooreela.com/uploads/1/3/0/8/130813516/widugoraruziw.pdfIn PDF document text
    • http://files.desjardinsproinsp.com/uploads/1/3/2/6/132681976/ginuta.pdfIn PDF document text
    • http://files.sofl.afaparents.org/uploads/1/3/1/4/131408970/df11d.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/1/0431/5188/4445/files/jupoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/78405416627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8384/8093/files/all_you_zombies_robert_a_heinlein.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/62079160298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/leluvub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/56598456283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/rubezegegax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/86224788378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/suninaxufizizim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/jimanodisadakoxasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/semobulexakanuguneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/39050106320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/rutelezidibe.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_off0000755e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755E 5072 bytes
SHA-256: 75db0f4e8a67660146da7226f1f61edc3b54655a37b08c9b09fa66e691ce0290
font_01_sfnt_off00008676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8676 10848 bytes
SHA-256: f6356df034de6994f8b4bf68ff15c1e2cda2b0503caf58b0af5a22cbfa331ec3

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