Malicious PDF — malware analysis report

Static analysis result for SHA-256 39767ebca4cce507…

MALICIOUS

PDF

33.4 KB Created: 2020-08-03 03:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 425f3b6e102ffb96f18ec380a7d802b1 SHA-1: 363f1d8f4d2e4e94b5cdcf16573f3c360b070d48 SHA-256: 39767ebca4cce50780891298347b2c1d9778526596e7d2cba504073ffd1c9611
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a redirector link pointing to ttraff.ru. Additionally, it contains a PDF link farm with 30 external links, many hosted on cdn.shopify.com, suggesting a large-scale distribution effort. The embedded URL in the document body also points to the malicious ttraff.ru domain, likely serving as a lure for users to click through to a malicious destination.

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=topix+land+rover In PDF document text
    • http://files.oxfordpard.com/uploads/1/3/0/8/130813645/wapox_lesunubomo_bepem.pdfIn PDF document text
    • http://files.stameliareled.com/uploads/1/3/2/6/132681342/67254904.pdfIn PDF document text
    • http://files.allinonepetcare.com/uploads/1/3/1/3/131384145/6736637.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/1/0438/2143/2992/files/95178245362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/minecraft_how_to_grow_grass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/zitenomekadulobiwisavib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/12221607294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/60706943038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/91895985900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/38241457592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/gatibazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/58203612927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/13025415753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1805/0984/files/82696298369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/kefiruda.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_off000047c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C3 4852 bytes
SHA-256: 7c8d2f154658168e41188f7b332787992b37f25156eacdbf5ec10441ede53e60
font_01_sfnt_off00005855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5855 9564 bytes
SHA-256: 9494f32f7702e0f6623382d5cf428dc09dd5a66b14bcb2066f747f3fad89361c

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