Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd37b6b1fed966a…

MALICIOUS

PDF

64.5 KB Created: 2020-08-23 19:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 79058914906ee8d7651b379dac7c2fee SHA-1: 4a74b24095d7ab09aefafa293ba21f69884fbf28 SHA-256: ccd37b6b1fed966a1763615f32fee97c79a8a7f505939e1039047b7504212a66
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a lab report and the malicious URL itself. Another critical heuristic indicates a PDF link farm, with multiple links to Shopify domains, one of which is also present in the extracted URLs. The primary malicious URL is used to lure the user into clicking on a link that likely leads to further malicious content or phishing pages.

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=study+of+diode+rectifier+circuits+lab+report In PDF document text
    • http://fiwitibok.shindigpublishing.com/uploads/1/3/0/7/130775388/1906585.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/1/0437/3259/8938/files/equation_test_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9559/4910/files/the_raven_edgar_allan_poe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4171/8426/files/states_abbreviations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1405/2247/files/bmw_x5_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2453/1101/files/descargar_antivirus_gratis_android_avast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/50525455807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuzodatusowajukekef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/slay_the_spire_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/manuel_d_agronomie_tropicale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.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 5

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_off0000bac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC8 5496 bytes
SHA-256: d6e9d07d42eba1755165a976b888995ef9f5779bfdea02531aeae3c1ef75c0f9
font_01_sfnt_off0000cd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD84 11512 bytes
SHA-256: c7aafba1fc0a56881bef5e0d36a87dfe0860533b47526bde3dd6b7a2aad5b5a8

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