Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec94e2a1de79ee6e…

MALICIOUS

PDF

44.5 KB Created: 2020-08-01 10:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f4cae1c5c57696efcf529847fe0fb5c SHA-1: f57841c43baf6deb4b48237e5208304253ca1a55 SHA-256: ec94e2a1de79ee6e7d68c85b5fb3c39711487687f0461f5119e34eec34294533
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating that it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains the text "Burn iso to usb mac" and the malicious URL https://ttraff.ru/pify?keyword=burn+iso+to+usb+mac. This suggests a social engineering attack aiming to trick users into visiting a malicious site by posing as a search result. The PDF_SEO_LINK_FARM heuristic further supports this by showing a large number of external links, likely for SEO manipulation or to host further malicious 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=burn+iso+to+usb+mac In PDF document text
    • http://files.piecedoccasion.net/uploads/1/3/0/8/130814397/vokavexofuxidazul.pdfIn PDF document text
    • http://files.liliyaphoto.com/uploads/1/3/1/4/131453527/sigosevavexugagu.pdfIn PDF document text
    • http://files.landslidetechnology.com/uploads/1/3/0/8/130874489/7f58628c5c.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/1/0435/0207/6070/files/cape_girardeau_mo_form_topix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/61340367131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/taronitipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3481/8198/files/58390013819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0968/5157/files/96556782895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/nepubasavojed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/munewuvogelow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mudamizoxudaxusuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3623/7206/files/rutuxozizog.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_off00005ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA4 5104 bytes
SHA-256: 7c75262b6382606eae31f201c0c14a5e5edd06722c75c869786bdae40ff6c6df
font_01_sfnt_off00006ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE2 10336 bytes
SHA-256: 22cf9bbb7355b895cdf634f426fbc957ce82c31e9dbeb390477c5aa4b4f9d981
font_02_sfnt_off0000907c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907C 16092 bytes
SHA-256: c0a2658b41d639f606eba7091e87e8bd42a81d8ac063310e149400b84daa429e

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