Malicious PDF — malware analysis report

Static analysis result for SHA-256 4101ebadd5439910…

MALICIOUS

PDF

49.4 KB Created: 2020-08-05 02:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53f339ffbe48f5cb2aaa4d090d84bcbe SHA-1: 95739f975048989adf42392522f89a92bba4e779 SHA-256: 4101ebadd5439910bfd857295473d5be17dd1a49902bf66b64f29ca2200df1c1
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=arrhythmia+causes+pdf', suggesting a lure related to medical information to entice clicks.

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=arrhythmia+causes+pdf In PDF document text
    • http://files.thetrashtalkblog.com/uploads/1/3/1/3/131379820/4068510.pdfIn PDF document text
    • http://files.changinglungcancer.com/uploads/1/3/0/7/130740210/vukafinuwaliwe-titazidegovif-maxoxosemuwoxa-modeze.pdfIn PDF document text
    • http://files.thefilamentstudio.com/uploads/1/3/1/6/131606035/fakesijerisaz.pdfIn PDF document text
    • http://files.kodamaforestschool.com/uploads/1/3/1/4/131453084/a067716d1c565d9.pdfIn PDF document text
    • http://files.wrigg.org/uploads/1/3/2/6/132695445/6562426.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/1/0433/8611/0110/files/design_patterns_in_java_with_realtime_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2962/files/65048718550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/sejapazesowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2461/1478/files/tilekinemumal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/85289648018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0253/4822/files/american_slang_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/sajizumobubuwab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/rapogodulolej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/91376147911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6032/9637/files/laritem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2014/7112/files/31055684412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5002/4603/files/ielts_writing_task_1_samples_band_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/44383153715.pdfIn PDF document text
    • https://medlineplus.gov/arrhythmia.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BB 5456 bytes
SHA-256: 8e6d6816ff312af4bdbdab42eaa2e1ab6b6e44865391bf488105fe87ab08b068
font_01_sfnt_off00009625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9625 10068 bytes
SHA-256: 36385ee4211c3e419d4c61a8e4f51f20614b35bca31e764221e8c531c6a23dbe