Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6dc726a30664bf0…

MALICIOUS

PDF

55.3 KB Created: 2020-08-06 15:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0815c68970dd41291c54409e8bbafd2 SHA-1: 155273bd553f7f83565be2b0ff45e35724a955a1 SHA-256: b6dc726a30664bf0282ba4ec2468a98afe90efcf4f7d6915945d8b55af07c591
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. It also exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on domains like 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the target URL and a benign-looking PDF filename, suggesting a lure for educational content to mask the malicious redirection. The presence of a visual download button further supports a deceptive workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=cbse%2011th%20economics%20book%20pdf In PDF document text
    • http://files.termarkleather.com/uploads/1/3/1/6/131636697/4997465.pdfIn PDF document text
    • http://files.questforreadingsuccess.com/uploads/1/3/1/4/131406717/d72c09e1f2.pdfIn PDF document text
    • http://files.valledaostareview.com/uploads/1/3/1/3/131383613/xasitusibujosed.pdfIn PDF document text
    • http://files.gateways2heritage.com/uploads/1/3/1/4/131453512/xavupanepujutirulad.pdfIn PDF document text
    • http://files.studio279fitness.com/uploads/1/3/0/7/130738915/serawirajisowaro.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/1/0428/9242/7430/files/kizeremezixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/24047683704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/64801984087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/rusawajotalulolosad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/oxford_thesaurus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/20475696767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/gafawazufefisamumawid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7898/6402/files/dark_crystal_creation_myths.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/47579001139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/99647974068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/definition_of_marriage_in_islam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0E 5216 bytes
SHA-256: bd262d4139194d0131a59d54d3bb8ec0c8f0002956221fbaff545433c295b6ac
font_01_sfnt_off00007fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA1 6964 bytes
SHA-256: 457a68f548e2198995f29e5d9b37301b6f2c98799a6bf819fbf3974c464d9a83
font_02_sfnt_off00009371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9371 10060 bytes
SHA-256: b079c4750aeb88608358d93694c48a48359f6f407c1294de81487a11936cdbc8
font_03_sfnt_off0000b629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB629 17492 bytes
SHA-256: 051ed633a7be10832c858ac59b38ef007b4b07ce5b3e93c11ff1ad4425d54c8f

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