Malicious PDF — malware analysis report

Static analysis result for SHA-256 190fce86daf7318e…

MALICIOUS

PDF

65.5 KB Created: 2020-08-11 09:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c79d71ae038e433bf2ba019e0e98c34 SHA-1: 36240b2f5e88cce1a6062c8907e15b28a8ae6c4c SHA-256: 190fce86daf7318ec2d708b176d5785fc40b616c6c93438f33087a540045d9a5
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to a redirector service (ttraff.ru). This behavior, combined with the ML classifier flagging the document as malicious, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same URL as the redirector, reinforcing the malicious intent.

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=cancer+cachexia+understanding+the+molecular+basis+pdf In PDF document text
    • http://files.guntervolleyball.com/uploads/1/3/1/3/131381640/365623bf9fb.pdfIn PDF document text
    • http://files.sligogreenway.com/uploads/1/3/1/4/131407135/retegopifenat.pdfIn PDF document text
    • http://nusunog.rozannaartist.co.uk/uploads/1/3/0/8/130814328/rowel.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/1/0430/8942/8637/files/catalog_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/17064975142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/convert_to_d_d_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/nakemuzezigowuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/wivabutinojanewefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/vubatiwawetafex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/11702799035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/remove_crop_marks_from_adobe_acrobat_dc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/linukadadolan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/misudelipelov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/lubanememibas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/sakafovigedidobanokixe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC050 5684 bytes
SHA-256: 45625fdd62e6f702be46652eacda16cd5f74b338577003bd3653c2e0c47ba839
font_01_sfnt_off0000d372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD372 11264 bytes
SHA-256: 6471dc950ead68625623735425b0dba2f64f05b2d15a0c95ac568775444f219c

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