Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d785cbe2974dc9c…

MALICIOUS

PDF

33.0 KB Created: 2020-08-04 06:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0202647b83ffd09e9ec0a4502e55f52 SHA-1: 15242c6c0c27691a0619e878fb5c167732b6a0ed SHA-256: 8d785cbe2974dc9c9b5a2436b99d1655189f9bf3ac9193399e5ba285c87402ca
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for hosting malicious content. The primary redirector URL is https://ttraff.ru/pify?keyword=application+of+buffer+solution+in+pharmacy+pdf, which is designed to lure users into downloading what appears to be a legitimate PDF but is instead a malicious link farm. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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=application+of+buffer+solution+in+pharmacy+pdf In PDF document text
    • http://files.joannepenn.com/uploads/1/3/1/8/131871569/3688364.pdfIn PDF document text
    • http://files.golfmanorsynagogue.org/uploads/1/3/1/4/131437464/gafewaritusixud_jamesepo_senaz_taxikasomov.pdfIn PDF document text
    • http://files.dekinderenhuis.com/uploads/1/3/1/8/131857540/ec87572c736a10.pdfIn PDF document text
    • http://files.natalierasmussen.com/uploads/1/3/1/6/131606638/sabetawaxovin_filoduxusiz.pdfIn PDF document text
    • http://files.kingdomhandymangillette.com/uploads/1/3/1/4/131453124/cdaff080253f213.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/1/0431/7793/5005/files/35592410921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2565/2117/files/rise_of_the_dungeon_master.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/fish_tycoon_2_magic_fish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/vanquishers_sword_vanilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/vewisiwesewagavir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/63714604341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/tuxagozozegafoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4086/4421/files/38870991953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/lesakesaxesidek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/pekuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/rewovegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/wutojogojaxego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/15837226603.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_off0000456b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x456B 5628 bytes
SHA-256: f8ef57ca596e82e6e10f4550ffc662ce02fccf7edf1963028a41aaa3019f91b8
font_01_sfnt_off00005868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5868 8964 bytes
SHA-256: d2214fd66f991e47254b2ae72875254b8d04341cbd3c8a0e7141bff80444c886