Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ef5bb6144c0f01…

MALICIOUS

PDF

48.4 KB Created: 2020-08-11 23:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b40878e49a4c3ec74c9c07d9ffe5adba SHA-1: 6974098a48f425fadeedb92a28876e90608c07ed SHA-256: d6ef5bb6144c0f01e8143e9fc41503271fc502557c30c96e5e814110b7485cac
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.cc/wb?keyword=minor%207th%20chords%20piano%20pdf In PDF document text
    • http://files.cuestacollegerodeo.com/uploads/1/3/1/4/131483550/f518ae417.pdfIn PDF document text
    • http://files.mccombwholesale.com/uploads/1/3/0/8/130874523/66696087308b750.pdfIn PDF document text
    • http://detexemo.1infinite.com/uploads/1/3/2/6/132681946/4aef2ee2f7038.pdfIn PDF document text
    • http://files.kidsneedyoga.com/uploads/1/3/1/4/131438786/zafasaza.pdfIn PDF document text
    • http://files.wholesale.fanhubnw.com/uploads/1/3/0/7/130775145/e1a73bf7.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/1/0429/0389/6217/files/52352672247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1130/8702/files/arbitration_adr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/5044574112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/book_of_mormon_musical_libretto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2200/0029/files/77552767413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/grey_fifty_shades_of_grey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/69291755943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/64374247579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1123/6259/files/dekanunatet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/63140678919.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D40 4968 bytes
SHA-256: 8b148fd3fc307b8723d024857b0549ccac68a4aa04c97a02835aadab0b901378
font_01_sfnt_off00006e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1C 10184 bytes
SHA-256: bb0995001e230b2c7d4fc3528646e43d0beabd46ce630def1ff38f37de7c6038
font_02_sfnt_off00009133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9133 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832
font_03_sfnt_off0000a61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA61B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378