Malicious PDF — malware analysis report

Static analysis result for SHA-256 959a0954aa95c43d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-23 00:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 865f7b7a7cfc83cc47b78aaf25849fb6 SHA-1: 550e3916e268b241f504994d02d5e2cd1ec4751d SHA-256: 959a0954aa95c43dc5c2d04091e3c6d716db599592ad91e2ad57b3ba9009755d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=tmux+cheat+sheet+resize'. This URL is presented to the user as a "tmux cheat sheet resize" within the document body. Additionally, the PDF exhibits characteristics of an SEO link farm, embedding numerous links to other PDFs, likely to manipulate search engine rankings and distribute malicious content. The presence of multiple benign Shopify links and one unknown link from 'levaf.definitivearts.net' suggests a broader distribution or redirection strategy.

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=tmux+cheat+sheet+resize In PDF document text
    • http://levaf.definitivearts.net/uploads/1/3/2/6/132680981/fezujijuziwaxuz-jidajepisarira-fawij-xowitamenako.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/1/0437/5642/1269/files/29._7604_n_95._3698_w.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/30185316679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/purufapabiwirobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/87453073964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8158/0200/files/wemodilogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/alter_ego_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovogosiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8089/0008/files/bowuperaxirazer.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 8

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_off00005291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5291 5076 bytes
SHA-256: 707f413b3c863a1676f0fff60a20321f29fe7ee0c2e1a19ef2962c7c52f7bde8
font_01_sfnt_off000063b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 10652 bytes
SHA-256: 4cc3883c3981f319b74e3bbb00929c617496a29e467bd1ea6a8b89c8078e4d6d
font_02_sfnt_off00008846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8846 16084 bytes
SHA-256: 1d58567f93ecd628bf014bd0841a08a19c5ebc5bef379569a2bedd04588a7f3c

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