Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5947e6a87b79655…

MALICIOUS

PDF

60.4 KB Created: 2020-08-20 20:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2a712b98f05b85d23a0f8cc142f5772d SHA-1: 82f1eaccb2fc0610b49b0fe13afa11ea0feed3bf SHA-256: c5947e6a87b79655908c7b7238e172fe81aaf9e12d47941e4ba62e950f18d666
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised with a keyword related to 'Valiant Hearts the Great War OST'. It also functions as a link farm, directing users to numerous other PDFs hosted on various domains, including Shopify. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be social engineering 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.cc/pify?keyword=valiant+hearts+the+great+war+ost In PDF document text
    • http://bapekivuk.mattersofthesoul.org/uploads/1/3/1/3/131379290/7c405.pdfIn PDF document text
    • http://files.rebednar.com/uploads/1/3/1/1/131163512/e6c9f8dab992.pdfIn PDF document text
    • http://nonowegu.canwestclaims.com/uploads/1/3/2/8/132814930/wejukinibakasolof.pdfIn PDF document text
    • http://files.aaupacific.com/uploads/1/3/1/4/131454304/37dba0f025c.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/1/0431/5404/7137/files/bsc_1st_year_maths_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/recurrent_calcium_oxalate_stone_formation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7126/6973/files/42977309867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6363/6131/files/76049210424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/nugavojot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/gezomif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/12294954354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/management_information_systems_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4286/4294/files/sbi_password_reset_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/valukolotilad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9826/0124/files/bunav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6649/7960/files/xowumix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/quarterly_calendar_2020.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 2

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_off0000adf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF5 5004 bytes
SHA-256: 8f750b2736887b30ea918f0ad85dd4055a9dd210edfea41c7e87afa9012864eb
font_01_sfnt_off0000bf02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF02 10932 bytes
SHA-256: c44db99aee7b60258cfb662281dc9f6ccd376da594cf75bb7fc014cbe759c144

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