Malicious PDF — malware analysis report

Static analysis result for SHA-256 23509bc9abe2c2a9…

MALICIOUS

PDF

33.9 KB Created: 2020-08-13 01:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23fb5f86cd3792f0265ec0de85980e81 SHA-1: a951395f515c656b55733e0dd080639d81958be8 SHA-256: 23509bc9abe2c2a9643756b863400c8dc770c576a91e3aa2dc825235265b168c
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=assertive+communication+worksheet+pdf`, which is flagged as malicious. This indicates a phishing or malware distribution attempt, likely using a lure related to 'assertive communication worksheet'. Although no scripts were extracted, the PDF structure and embedded links strongly suggest malicious intent.

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=assertive+communication+worksheet+pdf In PDF document text
    • http://files.mychoice-thefilm.com/uploads/1/3/2/8/132815181/vanumajogivab.pdfIn PDF document text
    • http://files.startoonz.com/uploads/1/3/2/6/132681880/9973a3ec95.pdfIn PDF document text
    • http://files.crossfitliveloud.com/uploads/1/3/0/9/130969352/5038501.pdfIn PDF document text
    • http://files.raggedmountainrunning.com/uploads/1/3/0/7/130776273/3ef5718.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/1/0432/5713/5264/files/zoleraxamopibudusatosawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/27219307252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/binary_options_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6701/5329/files/nirarevemowewofajovereba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/nusigovetute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/wuberesinaxomufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/bivosotazemerelurunutepiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/62823104211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/25683237507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/xajawedowoweloluferof.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 8

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_off000046d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46D7 5568 bytes
SHA-256: 999b976e70e58e5f311732175fcf18c0ba94b8a580665a43fe8efa9d9de124bb
font_01_sfnt_off000059b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B1 9764 bytes
SHA-256: f76c1be6396e6d2318b31236d35a70a826236fe5936003f7278796ceeae4f0a0

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