Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf90a5fd4a309af…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 08:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a38f664eb29af070d9843eb40d0f6c4d SHA-1: a5b55999410bb24fd99b85957f12ba9d6ed51402 SHA-256: dbf90a5fd4a309af032023ebfe530d14fe6c9ab70608d432ef9c8c827ec11aa5
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 number of external PDF links, indicative of an SEO link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=capture+one+pro++size, which is likely used to redirect users to further malicious content. The document body contains text related to 'Capture one pro size' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to download or interact with potentially harmful software.

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=capture+one+pro++size In PDF document text
    • http://koxewol.bodypercussionclassroom.com/uploads/1/3/2/3/132303079/xonawegope.pdfIn PDF document text
    • http://files.gaitwaychiropractic.com/uploads/1/3/0/7/130776490/253680.pdfIn PDF document text
    • http://files.carlsingletoneconomics.com/uploads/1/3/2/6/132681670/zabijebibaf_vulonazegiwazu_doxefop_fuwabagodejo.pdfIn PDF document text
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.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/1/0429/3269/9292/files/69255326854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6449/0149/files/bunny_kingdom_in_the_sky_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/11344871887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/6580955374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/ar_android_camera_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/21553462642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/cbse_sample_papers_for_class_10_2020_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0088/1315/files/nodofuxunexediganewume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/6644711421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/52180695239.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 8

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_off00006c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C52 4736 bytes
SHA-256: cdc1de6ca50e2fd92c842c5fdc61f6d8aaba28d7ef69d83d794f5165cc7072f2
font_01_sfnt_off00007c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 10628 bytes
SHA-256: 7881ae0c8ab0f01b2265c1eae1f9fa16b0d06f9bb0ce67915a1ae5454ffd68cd

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