Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94504bba57ff36a…

MALICIOUS

PDF

47.7 KB Created: 2020-08-25 15:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14a3db6d0a5b7567a9f382a42a036192 SHA-1: e1d2642428b5214d4b70e65d0451403231b18844 SHA-256: d94504bba57ff36ae4749ddcdd1266b2b6d1f72c75aef41dfa86dee19612d86b
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to a URL that appears to be part of a link farm, designed to attract traffic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

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=child+care+information+form+template In PDF document text
    • http://files.janaiahutzal.com/uploads/1/3/1/4/131406295/gedugedin.pdfIn PDF document text
    • http://files.mrsreyesclass.com/uploads/1/3/0/7/130774962/d250629.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/1/0437/6880/7586/files/tisukimizivobew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/rinomapimafup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6873/3078/files/88023878678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2650/4086/files/peselokesiviruxojivivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0011/8680/files/54167935603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6027/1006/files/honda_automatic_transmission_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/cavernous_transformation_of_portal_vein_thrombosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/82826144792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3794/1909/files/lizakofezumolodukitafuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4277/3914/files/jetew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7230/6843/files/nupemoxovufufix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/20256515414.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 1

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_off00006d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 5124 bytes
SHA-256: cfc5682c3e3196b22689ac8ad369e744044e846658d93237a70bac29fb9a1f25
font_01_sfnt_off00007e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4D 15988 bytes
SHA-256: a86e3de5d5fc6778711c97f4f452f6ee3f90a0cd4002fd03ee0c940130384c79

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