Malicious PDF — malware analysis report

Static analysis result for SHA-256 585d45d1fcf4e90d…

MALICIOUS

PDF

52.0 KB Created: 2020-08-19 12:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 625329a77a48042125dae23cd1852aba SHA-1: 4bcd96c07a20249ea5bbcf9b2add220d9d57daf8 SHA-256: 585d45d1fcf4e90dc10b30cb2cd2b0b3d1e6abc9cb2f521292361cdfbfe8ce8d
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm designed to distribute SEO-optimized PDF documents. One critical heuristic identified a link to a known malicious redirector infrastructure at `ttraff.com`. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution. 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.com/pify?keyword=anatomia+macroscopica+del+sistema+nervioso+central+pdf In PDF document text
    • http://files.getfitnation.org/uploads/1/3/2/6/132681824/gusinabope.pdfIn PDF document text
    • http://files.cogitojiujitsu.com/uploads/1/3/1/4/131438604/nalisapimod_nivogujadijex_pagegebesiniwet_tulolaruwerapu.pdfIn PDF document text
    • http://files.homeschoolclick.com/uploads/1/3/1/3/131384605/xajexifijaj.pdfIn PDF document text
    • http://files.gracpiacenza.com/uploads/1/3/0/8/130814121/jilevalunelelatu.pdfIn PDF document text
    • http://files.twhstheater.com/uploads/1/3/2/6/132681783/dugiwumiv.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/1/0430/9244/3303/files/33744563602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/official_guide_gmat_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/50369553736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/66535566126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/podoravetabunepujipasaxil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/the_aviary_cocktail_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/folovigopujolamuvosoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/new_cabinet_ministers_of_telangana_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/pibib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/cantaloupe_island_tabs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/mikejenisaruwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/sodesapamabutoxeneginot.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D94 5140 bytes
SHA-256: f2974c9fec23e73694591f237ebbc588ba4961a41586f6e3807b0b95827b1c46
font_01_sfnt_off00008ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF2 11552 bytes
SHA-256: 01d77b7a56d784d523e3534109619ada606a253868c54c6855bff5e00d7dc077
font_02_sfnt_off0000b48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB48A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378