Malicious PDF — malware analysis report

Static analysis result for SHA-256 70649bb644eb86a8…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 16:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27cde2b6cde47808ff1b32bfcffcafa3 SHA-1: a95e66844c05af67eb2121d868e0bb72fb618780 SHA-256: 70649bb644eb86a8a68e10de0d8b83dfb9cfa1410d2ee455373027fd2a145963
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body and embedded links suggest a lure related to 'Upper extremity nerve glides pdf', likely a pretext for a phishing or malware delivery scheme. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=upper%20extremity%20nerve%20glides%20pdf In PDF document text
    • http://belab.artbycierranicole.com/uploads/1/3/1/4/131438641/7147800.pdfIn PDF document text
    • http://gutatazi.mehanphoto.com/uploads/1/3/1/1/131163635/dizodevag.pdfIn PDF document text
    • http://rasaluse.aztecroguefoodsllc.com/uploads/1/3/1/4/131407406/c21b45e48e3a76.pdfIn PDF document text
    • http://files.sngservicesplus.com/uploads/1/3/1/1/131164081/567266.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/1/0431/9890/6528/files/1558281670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/bulugorepebapubatataden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suxuteregejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/30188414785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/22869260077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2305/5523/files/scientific_names_of_plants_and_animals_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/male_genital_piercing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/vofup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/leguragonixonazojipamibik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/nepevodewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/90346670824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/sciatica_treatment_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/managerial_accounting_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6204/8421/files/15552950027.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6698 5372 bytes
SHA-256: 94cd9d622a863986f54af7ba85e3f05830b8eb7950ca6e0130c0e5e2484baab7
font_01_sfnt_off000078e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E6 9964 bytes
SHA-256: 5feb0b9567694ada86d82bb36afcde1872a96f4ced6a1c3b7b2bddad0909a157