Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3fcd151772372d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 13:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 33e60577780e94542ff3fef3a4fedb90 SHA-1: 79ad9ab0f710f7a7a59f97d8b8592f86d18ee93b SHA-256: 4a3fcd151772372df98b5c065f1ee926e8e09d87f3b4d2eb1a51e7fc57ee9246
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a high number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used to distribute malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=sia+chandelier+instrumental, which likely serves as a redirector to further obfuscate the final payload.

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=sia+chandelier+instrumental In PDF document text
    • http://daluvin.coteglace.com/uploads/1/3/1/4/131437792/cace2add66b.pdfIn PDF document text
    • http://seluzo.genawave.com/uploads/1/3/1/3/131398177/detanu_kavawape_zopenuri.pdfIn PDF document text
    • http://files.natesessentialtraining.com/uploads/1/3/0/7/130739490/1861880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/zaxosijafotiwitigazex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/voxorelipesowezefukovelox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/endometriosis_puerperal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/77417761317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4262/5953/files/carpentry_course.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/xijadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/39104313732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4797/files/basic_learning_computer_notes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5769 5056 bytes
SHA-256: bcffddc6924c835921743f6d9125d717eaab0e2487f8508427515ac6e9b6c938
font_01_sfnt_off0000684a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684A 9920 bytes
SHA-256: 5bc696d41949d3fef39904aa4c0551cfefc6d1279b7d6575eec37620afd7d35a
font_02_sfnt_off00008a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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