Malicious PDF — malware analysis report

Static analysis result for SHA-256 d855bde8e9e38d49…

MALICIOUS

PDF

38.6 KB Created: 2020-08-05 05:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 037a9007d462b1cfcad92f7a818dfd7d SHA-1: e7f3584c2543fad9e23bb2f1df6c071ccb8357fc SHA-256: d855bde8e9e38d496f549761fa4d6313a40037c30427f12d260a4617ae3782e8
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=convertir+de+pdf+a+word+reconocimiento+de+texto+ocr%2529, which is likely used to funnel victims to further malicious content. The document body itself is largely unreadable binary data, but the embedded links are the primary vector for attack.

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=convertir+de+pdf+a+word+reconocimiento+de+texto+ocr%2529 In PDF document text
    • http://files.lindaepix.com/uploads/1/3/1/3/131379110/73d3ec673c62ca8.pdfIn PDF document text
    • http://files.meditationwithmish.com/uploads/1/3/1/4/131437443/junigib.pdfIn PDF document text
    • http://kekod.perkinstherapygroup.com/uploads/1/3/1/4/131454012/tunumexirilevoxoka.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/1/0427/5588/3175/files/40077223805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/vunekapexibunirawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/kixomumid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6259/9586/files/11930883880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6786/6265/files/xesilufivodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/66947347659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/94323690531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/mla_format_outline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6837/2632/files/95054589421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1388/8424/files/64945171148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1721/4874/files/31699705672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/norafowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/88134222421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/zozolejuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/78658903846.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 3

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_off000054d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D4 5292 bytes
SHA-256: 8f60bfd7436d275daccfa7e5d1c4472faf024319264dea2a592a3492dac215fc
font_01_sfnt_off000066e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 11184 bytes
SHA-256: 096bbfcec9ae0d6cff120398d057ce7cc860723e8f405e19cb84a3e0db212454

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