Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28cbc5cfd2c60b6…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 00:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 491efd2cebf52c2f9821fafb9112887c SHA-1: 50ba99b50c62d52b6bfa79bc4adbf275c6e222da SHA-256: d28cbc5cfd2c60b6259dcaf21460e4a9cfbe11572fb86f8902f460c11a513774
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of this document being used for malicious redirection. The primary malicious IOC is the ttraff.ru URL, which is likely part of a phishing or malware distribution chain. No scripts were extracted, limiting the analysis of direct payload execution.

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=stages+of+prophase+1+pdf In PDF document text
    • http://viwarikal.kimcoverdill.com/uploads/1/3/0/7/130775413/e4b7d.pdfIn PDF document text
    • http://files.76bulbs.com/uploads/1/3/1/3/131381231/medetotiv.pdfIn PDF document text
    • http://files.alloneocean.org/uploads/1/3/0/7/130775623/c58dd4c915a.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/1/0432/8144/9124/files/bhagavad_gita_quotes_in_bengali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/dababigotix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/14375136760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/8548026816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/fasuzejotuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/zofelewinerasezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/pojeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/78765988329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/jorupulidenedide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

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_off00005fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB0 5424 bytes
SHA-256: 164ac93fb36512b0341b38768730e395e828f40fe1647fd9b98a856295c612db
font_01_sfnt_off00007223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 9756 bytes
SHA-256: 4cb573ae26f11b389e8807ff16cde0c24264205c871570aebc82b518f4471b95
font_02_sfnt_off000093b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93B3 16244 bytes
SHA-256: 30d9cf982de3c7f89126d3c4dbe08af1bc14e63195f28c5f4a64fa054bc6d3f9

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