Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4d400567085bd5…

MALICIOUS

PDF

45.3 KB Created: 2020-08-19 05:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 36e9ffbfcf1b2ca01dc197b2f7bbfb9f SHA-1: 4d96121c1add48ba3ed724d18dd387577604a759 SHA-256: 2a4d400567085bd59381ea018e18a87e1e80b7ef211f14f375a993a9cc196b1d
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search engine results, with the primary link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=ubuntu+bootable+usb+stick+format', which is flagged as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites by disguising them as helpful content.

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=ubuntu+bootable+usb+stick+format In PDF document text
    • http://jizuw.ourgreattravelblog.org/uploads/1/3/1/4/131411688/794b728f6aac3.pdfIn PDF document text
    • http://files.indieartistpress.com/uploads/1/3/0/7/130776445/vukazab-lojoxufo.pdfIn PDF document text
    • http://files.actorheadshotphoto.com/uploads/1/3/2/6/132695325/bf296ccd5c.pdfIn PDF document text
    • http://files.csaheating.com/uploads/1/3/0/9/130969772/21a54039.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/1/0434/5040/0920/files/88070057463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8793/8211/files/zemedusab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/kubux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/pofodogatas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/84919234211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/73142125722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/wifigafifotubutudovugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3498/4857/files/zelun.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_off00005f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6C 5220 bytes
SHA-256: 2c3cefa684e2d5b99b5060041072c6050f778a91c39c7cb4cbe5db432d2a46e2
font_01_sfnt_off00007120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 10020 bytes
SHA-256: 858da4c5ce391462ac408fcec38c720f3bc7211c438ee41097fc1243fee3adca
font_02_sfnt_off00009392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9392 16088 bytes
SHA-256: ba49a359edda73fb432b2118eee43e8681603f6c6f845ef214af08c3a95321db

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