Malicious PDF — malware analysis report

Static analysis result for SHA-256 844c874978377258…

MALICIOUS

PDF

37.1 KB Created: 2020-08-25 01:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 390e9bcbf24dfc5e763ba44403334f83 SHA-1: 057ad69f1c59c0a422968475ee34d904d4326a42 SHA-256: 844c874978377258ffd01d1c0265ac4ef59b4e673a914b2431d2f5eed6c7cd2b
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body and embedded link structures suggest a link farm designed to funnel users through redirectors like 'ttraff.ru'. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

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=lulu+guide+mua+9 In PDF document text
    • http://nosewetiv.24hour-electricians-bridgend.co.uk/uploads/1/3/1/6/131606490/zuduxikarav-jexaf-dekepuwazumuset.pdfIn PDF document text
    • http://files.oplfoundation.org/uploads/1/3/1/0/131070146/6058bed90d.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/1/0434/1504/4245/files/bujerewifebibidogaxirur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/5917/6601/files/bhojpuri_video_hd_2017_pagalworld.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/47966881253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4330/7175/files/91092922425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0151/2095/files/cancelling_verizon_fios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/82507807879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/the_human_chair.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/alternity_gamemaster_guide_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/42691963578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/18883015450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7134/7619/files/51207343052.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 3

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_off000053ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53ED 4968 bytes
SHA-256: 8ca4fb97c7f5872963cf41eeb75640352caf815e5c81e84862772b40ec45de4b
font_01_sfnt_off000064c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C5 10376 bytes
SHA-256: b9653b6d5808858cf050850418e46385c77e1e1eec35bcf731bbe21d4880abb7

Open this report in the interactive analyzer, or submit your own file for analysis.