Malicious PDF — malware analysis report

Static analysis result for SHA-256 e437595991240920…

MALICIOUS

PDF

47.7 KB Created: 2020-08-31 15:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a72943f5b9d1d0c4abb399ac6b73531 SHA-1: 4d17723ecf38702b2f9f20638416a1e32d81b7d6 SHA-256: e437595991240920d45fc6314e9421e623c6816c68a65b110301b71bfd0f17fa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious link, which is likely intended to download further malicious content or lead to a phishing site.

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/wix?keyword=decode+application%252F+x-+www-+form-+urlencoded+java In 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/1/0457/0120/2076/files/capral_aluminium_extrusions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2874/0258/files/utorrent_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10542261424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/jokewefopibarejato.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3649d2_2167724cd9ef456f807d3b9da4edce73.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b13fd1_d887c904c2fd485e99de86f2a3115a60.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1a12568969754dccaee4bf1f88b6d39a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/wokokoroxerixepaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/bisebizisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0703/9897/files/apartment_owners_association_rules_and_regulations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/2591962048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/the_essential_cosmic_perspective_6th_edition.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

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_off00005d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D98 5488 bytes
SHA-256: ef2561f63ecc31ad66570a33d5b28afdcca0591630186bbd54587952c9833ed6
font_01_sfnt_off00007062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7062 13124 bytes
SHA-256: 0d643f24f3b9a90cd7309009135a0479db2dce1af8fe3964680b3fee90c2961d
font_02_sfnt_off00009a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A64 16756 bytes
SHA-256: 66ebc0a0ad91e65a10baeb16446991f67cccedd9ebfb903d71229f49e92537dd

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