Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c23520ee2570949…

MALICIOUS

PDF

32.6 KB Created: 2020-08-09 05:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbcbea8c4aca7af75c284ece9eb06ef6 SHA-1: 98aa0becaa7928ed6001311067349cc12c662637 SHA-256: 5c23520ee2570949364eafdb784a6c63c8d93d344d0af8e9b0b30e1959874a54
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL that points to malicious infrastructure, disguised as a user manual. The ML classifier strongly indicates maliciousness. The embedded URLs suggest a phishing or scam attempt to redirect users to potentially harmful 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.cc/pify?keyword=ashrae+90.+1+user+s+manual+2020+pdf In PDF document text
    • http://files.janrosenberg.com/uploads/1/3/0/9/130969059/zikebibifudex.pdfIn PDF document text
    • http://files.ny6thinktank.org/uploads/1/3/1/4/131437862/rufafanodedajifuv.pdfIn PDF document text
    • http://files.galleryatno6.co.uk/uploads/1/3/1/4/131411688/gadasosokazibezawa.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/1/0443/4313/2316/files/adobe_scan_to_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9688/1814/files/23876779929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/95789665855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/gewiverikotuzoboxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/silukexalegulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/nazidinegaven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/arnold_schwarzenegger_sound_board.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/tm-_ac1900_firmware_downgrade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/pexugupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8708/5220/files/find_duplicates_in_sql.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8044/0215/files/8317982217.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 6

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_off00004284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4284 5784 bytes
SHA-256: 9736713e1be3db2e4eebadc99b67bc6781472f732377aa99cf1690ea8000d02a
font_01_sfnt_off0000560b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x560B 9212 bytes
SHA-256: 52b2cbf1a86994fca3ea44689a2e87e21033141c86257ed55bf6f0173061e57c

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