Malicious PDF — malware analysis report

Static analysis result for SHA-256 691c0b3000f2d780…

MALICIOUS

PDF

50.6 KB Created: 2020-08-17 16:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b3353c03c86ad20b742ab3dffdb5e71 SHA-1: 5440e0d29a1d8ccc58ba9b24a16829fe80f2d12e SHA-256: 691c0b3000f2d780b0c965328db62cfb5208d39b308247fba7f1f7f1feecb767
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector link to 'ttraff.ru'. This suggests a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious infrastructure. The presence of numerous PDF links further indicates a link farm or SEO manipulation tactic. No scripts were extracted, but the embedded links are the primary indicators of 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=format+html+file+in+vscode In PDF document text
    • http://jakama.futurescholarslearning.com/uploads/1/3/1/6/131636727/vofol_sonefoke_dupol_sopokejupafal.pdfIn PDF document text
    • http://files.cruzah.com/uploads/1/3/1/3/131398059/gumuden-pamivepu-pewikiwid-zenem.pdfIn PDF document text
    • http://files.ministryofbaby.com/uploads/1/3/1/4/131438038/zugiretoxane_lufoz_sofosadofego.pdfIn PDF document text
    • http://files.ambersballoons.com/uploads/1/3/2/3/132303147/refole.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/1/0434/7405/9426/files/1899080408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/24157116033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85213016947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6709/5705/files/factors_affecting_buyer_behaviour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/disokirobusaxiwupitefipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/36868077666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/st-_120_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1116/8663/files/learning_russian_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/22361637355.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_off00006654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 5276 bytes
SHA-256: 6ac9cc41d72fa6930e40eb99a27d833f713e7ac299385df4a34ba5983c8e811d
font_01_sfnt_off00007819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7819 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off000081ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BA 10636 bytes
SHA-256: 87272a1c1b19c6e95d3a4494aae493faa422955be99ca9708ed193e1fd47a413
font_03_sfnt_off0000a646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA646 16576 bytes
SHA-256: 89bb7b168b7638a9bd3bf894e45ed2757651b091ba91862f7a33c00ee4b2c15d

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