Malicious PDF — malware analysis report

Static analysis result for SHA-256 115f5a8b49ba832c…

MALICIOUS

PDF

51.9 KB Created: 2020-08-22 06:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 649a2e8b5237f8b9b409b1a5ea6504c7 SHA-1: 8ddb0f42b8f194ad4a6b042a3aa6da39c714331f SHA-256: 115f5a8b49ba832c183f31a959ded69c2d2fc70e1272efb5ab6b82b51111ca17
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, masquerading as a free interior design course book. One of these links, 'https://ttraff.ru/pify?keyword=interior+design+course+book+pdf', is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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=interior+design+course+book+pdf In PDF document text
    • http://files.greenbuffaloestates.com/uploads/1/3/0/9/130969327/tomefat.pdfIn PDF document text
    • http://files.dunhamsseptic.com/uploads/1/3/2/6/132683292/253f7715.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/1/0431/8117/9048/files/duzetejujifexemaxigawux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/92874045891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4960/3487/files/23306206873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3225/6407/files/cissp_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/acls_guidelines_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/jurofokedolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/canoscan_lide_110_scan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/academic_listening_practice_test_10_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/38941309629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/danigufani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7146/5624/files/new_immunization_schedule.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 4

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_off0000636b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636B 13008 bytes
SHA-256: 5e7bbfc33eb4ccd35febd62397933737a19f0054523cc54ba86920c9a317fd8b
font_01_sfnt_off00008d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D59 5220 bytes
SHA-256: dd01c15870b40dd41d00624cf80cd0013937d51036bfedcc070057cd7402d0c7
font_02_sfnt_off00009f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2E 10352 bytes
SHA-256: 52a4fdf0f6e2423905d749a836f81fe964b2cf6603475f86c39dffe83633587f

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