Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b19f79a7acfd57e…

MALICIOUS

PDF

50.2 KB Created: 2020-08-14 13:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67ed4b85e54726e1670b7025b6730293 SHA-1: 0920b333e96c6e017610880af596562795a2bae4 SHA-256: 7b19f79a7acfd57e9e18c7349affa0c153d43fef276aabfe991b605c7e0bf2bc
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 (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise a phishing or malware distribution lure. The presence of many links to seemingly benign PDFs hosted on Shopify, combined with the malicious redirector, indicates a link farm strategy to obscure the true 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=thyroid+cancer+guidelines+2019 In PDF document text
    • http://files.cccelkhart.org/uploads/1/3/0/8/130874253/vejaxafum.pdfIn PDF document text
    • http://files.learningtobuyahome.com/uploads/1/3/1/4/131406391/wepawodugibelo.pdfIn PDF document text
    • http://files.rosemclarney.com/uploads/1/3/0/8/130874210/zuzopowafuniroful.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/1/0437/5294/7873/files/bellini_intelli_kitchen_master_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/john_deere_826_snowblower_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/betepip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6231/files/adversarial_machine_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9380/3679/files/metroid_nes_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3420/6620/files/55029825734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/77217730509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/zilabafegerenumulewelobej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/castle_crashers_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/24689983157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4611/3173/files/cambridge_igcse_business_studies_workbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/38484642396.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_off0000851f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851F 5732 bytes
SHA-256: 3bbc3962a2a319e2c26cf7cb457122f62924f8d047b015fdf0aca2f61b2ea7a5
font_01_sfnt_off000098a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A3 10264 bytes
SHA-256: 323eb1fc7f116b337345ae0ed5023c3e6f959505244215c1cd455fa9ed4f3dd2

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