Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64cf6e928aee891…

MALICIOUS

PDF

36.5 KB Created: 2020-08-19 11:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 123aa023bd402db43be32007e6b305da SHA-1: d3140789cea776081bf8bcac0f4cb4e128b1460b SHA-256: b64cf6e928aee891f6d78cc4e237711f79139e5a34fa9446b803876fd80c3edd
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a 'jungle book tamil audio track' keyword. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering, luring users to click on the malicious link under the guise of finding content.

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=jungle+book+tamil+audio+track In PDF document text
    • http://xorikewi.enfieldjolf.org/uploads/1/3/1/8/131856937/3121121.pdfIn PDF document text
    • http://ribomasez.renegadesfp.com/uploads/1/3/0/9/130969742/zabefel_suvodonimik_xebibol_bolivino.pdfIn PDF document text
    • http://urlgoal.com/jd7l4TheIn 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/1/0427/9071/5548/files/sukajumipakolalamudiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/6343358162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/gumijavixarunapanut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5178/5109/files/apple_store_fake_email.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/57145862928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/flight_sound_effects_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/zegoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/simple_mandala_colouring_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/76495212283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/amplificateur_audio_classe_d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3792/5281/files/meningitis_bacteriana_nios.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 2

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_off000050c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C9 5272 bytes
SHA-256: c46e7d5fbc90dad5680c7ad93a0547b2851edd9ab7ca1d2c74646925dcb24fc6
font_01_sfnt_off0000629c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 10088 bytes
SHA-256: ee47a5bd702817911b3291c22b20b9f06c3aea9f65ae6159a3f69e9b5c2f30f3

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