Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2cdfdbf7917b38…

MALICIOUS

PDF

62.1 KB Created: 2020-10-14 20:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 44d7dd8712695958987d888b195f5188 SHA-1: 1d37482050af195340a0f954051749e692e8800c SHA-256: 4b2cdfdbf7917b386157ee1a5621ad295c884a30cc9c75940fc9a84738440530
194 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, including a primary link to 'gettraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise malicious links as legitimate 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://gettraff.ru/strik?keyword=farmacos+antagonistas+adrenergicos+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f870db5235ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f872921425e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f8708ad5ac00.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/d357973b93c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f86f865dc8cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f86f6bc8f065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f8721e772c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f870299156a8.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/edbd2edb1a75.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/c8a1498.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3597/9676/files/xodevitejida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/crescent_moon_herbals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c422d96-f0a9-4f5a-8088-50af736ad4ab/rulipobawutoporefudijen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d7a1ac-a4a6-45a7-98d1-e61fd59f54e8/83344188093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25855072-f202-4732-b656-50635b7c45cc/9972303981.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9046 1644 bytes
SHA-256: 37c24baa18d0073ec8030c3588704cc78396206b8b2b974af8757a8904f74525
font_01_sfnt_off00009881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9881 5184 bytes
SHA-256: 0f57a2f1a0ea3b95dbdb5f8c8816825ab90d61d3698d8cfa8ce02435b032459d
font_02_sfnt_off0000aa06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA06 16280 bytes
SHA-256: 6a649bda889dbdac8eab0057007441bced90c6ecb997c62e0f5d35486006f6a4
font_03_sfnt_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3