Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a5b916f98eaaf4…

MALICIOUS

PDF

47.6 KB Created: 2020-08-14 16:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fcf9d752d22dc3442511b01ed54d0a0a SHA-1: a05be75e066b7aca9bbd22a73d230c21e4aa94c1 SHA-256: 38a5b916f98eaaf4e1058b5e9006fac34dc80d96ff42505e70bd9baac6574485
194 Risk Score

Malware Insights

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

The PDF contains a link farm, with a primary malicious redirector URL disguised as a camera manual. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other URLs pointing to PDF files, likely to create a link farm for SEO poisoning or to host further malicious 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.ru/pify?keyword=blackmagic+pocket+camera+4k+manual In PDF document text
    • http://files.nespractitioners.com/uploads/1/3/0/9/130969166/3511121.pdfIn PDF document text
    • http://jegagu.tbndesigns.com/uploads/1/3/2/7/132740905/863980.pdfIn PDF document text
    • http://files.msrendasartwork.com/uploads/1/3/2/7/132710779/ronoteli.pdfIn PDF document text
    • http://files.cumberlandhabitat.org/uploads/1/3/1/4/131437464/vewep-zulabenivexo-dovodejezepato.pdfIn PDF document text
    • http://files.royalgymnastics.com/uploads/1/3/0/7/130775441/958381.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/1/0434/1560/1314/files/57034748720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6908/6619/files/tipos_de_anemia_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/58165888665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/5441443651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/50634177805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/adversity_quotient_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/9784068261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3758/7613/files/dugajiribamuvuzujenoredur.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 8

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_off00007b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B99 5276 bytes
SHA-256: ae9b283bc68133c8e912919c77c4254ca11b23daa33b2f93f1b2f97e4396df7e
font_01_sfnt_off00008d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D80 10624 bytes
SHA-256: f8ff61a89a37dca0dc997234775796ff14ff0c37b207151524cbf9334bd26798

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