Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a37283fcd8285a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-06 04:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1367eeb72d6cabf411c0ccd012fa995 SHA-1: 09a0b573f02ad849db8a021e4e364d7ecda6f329 SHA-256: 85a37283fcd8285a35ec338b06507f8c8db2088605a07896d64733282d9ade91
242 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious redirection scheme. The presence of a 'download button' lure and the 'password-protected archive' heuristic suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=day+of+the+dead+mask+template+pdf In PDF document text
    • http://files.hellorhighwaterfarm.com/uploads/1/3/2/6/132683168/gotatenix.pdfIn PDF document text
    • http://files.optimistclubofcarlsbad.org/uploads/1/3/1/4/131453018/fe4bf68.pdfIn PDF document text
    • http://files.waypointwes.org/uploads/1/3/2/8/132815298/jusumaxilibado.pdfIn PDF document text
    • http://files.wineverytime19.com/uploads/1/3/1/6/131636676/xixigufanivijuz.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/1/0429/1140/0102/files/28163949750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/gta_5_xbox_one_dns_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/ladugipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/zaleganuxivonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/karti_igra_v_dyraka_podkidnoi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/flashbang_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/luwiwivedodinojemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/gua_ilustrada_de_la_avifauna_colombiana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/breathing_techniques_for_singing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/88738004746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/megobozarifovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/94618072007.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000672c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 5352 bytes
SHA-256: 0488ea17207991f4d773a7a6523758f53537fe30200e63349ae611eadd43adda
font_01_sfnt_off00007953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 10096 bytes
SHA-256: f8cff7ad7b6206204f8b914f3bf396c43ee87b475e1b58c7567165a7550204b1