Malicious PDF — malware analysis report

Static analysis result for SHA-256 72acfbba8cb40ca0…

MALICIOUS

PDF

44.7 KB Created: 2020-08-05 01:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 621932ae030951d89c7f4d2b158880f3 SHA-1: 5137a02691f877f2e7b8f8f411eafe94fb6d30a1 SHA-256: 72acfbba8cb40ca0644d4c45ac6539f94ce917365ecc6129a3e356a60a5479b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service at 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains a reference to the same redirector URL. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=balance+general+ejemplo+pdf In PDF document text
    • http://files.northpointpsychology.com/uploads/1/3/1/6/131606256/d13ec37.pdfIn PDF document text
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdfIn PDF document text
    • http://files.rapidrealestatevideo.com/uploads/1/3/0/7/130739280/nameki_pomepopujanu_suguxipir_selulimer.pdfIn PDF document text
    • http://files.santasjinglehouse.com/uploads/1/3/0/8/130873820/2641892.pdfIn PDF document text
    • http://files.visualisenewzealand.com/uploads/1/3/0/9/130969389/7966416.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/1/0430/3123/2674/files/42152435777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/kuvelizaritonekugowevino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/gabalubutaninus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/67800627666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/sabemalarodagafaxisul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/ehlers_danlos_syndrome_types.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/blacksmith_leveling_guide_ffxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0291/9074/files/vosifuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/22965471376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4522/3581/files/39468718188.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674F 5424 bytes
SHA-256: c63a71c735f417c2388f237e068505177fc612582d654283578c575b5c8375f7
font_01_sfnt_off000079ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00008239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8239 10380 bytes
SHA-256: 5f932ec40108fc167f8d4ef955d2c6be1ac53244f4746f84d530d0e0b6cb0a8a

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