Malicious PDF — malware analysis report

Static analysis result for SHA-256 5996ed75c5f23051…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 16:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20d871ac3302635d5f7dcd3a19e64a8a SHA-1: b51d497e3048bd0be3f8cddc029b243bb3d893e8 SHA-256: 5996ed75c5f23051ef532bf95da23a3a10d4200bf10b9ce911ecc841ef59461d
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics, including a malicious redirector link and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, likely intended to obscure the final destination and potentially lead the user to a phishing or malware distribution site. The presence of numerous external links suggests a content-scraping or link-farming technique to distribute 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.com/pify?keyword=fisiopatologia+del+pancreas+endocrino+pdf In PDF document text
    • http://files.actamsea.org/uploads/1/3/0/7/130738779/bazafagifab.pdfIn PDF document text
    • http://files.mischiefprojections.com/uploads/1/3/0/9/130969633/mafej-lufemofunugo-lufeb.pdfIn PDF document text
    • http://files.ncscac.org/uploads/1/3/1/8/131856626/foxifarivez.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/1/0433/1572/4443/files/juzoxesomasezamabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/89326408040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/50621889396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4805/8536/files/20090963438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/odisha_govt_holiday_calendar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/56959851693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7845/8275/files/29149837350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/kowofinemigatijifegewamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/dinujibafoxegike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/pudozidezavol.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_off00005f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F56 5276 bytes
SHA-256: dfeef2f7211658b1f86e21caf3b43993c834604554788fcd76a9b0aaabd8bb3d
font_01_sfnt_off0000715a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 12040 bytes
SHA-256: 19230e4d138e4c7b6d4c485ef242ba9dec1970ca61c5e6042fbf026d959eea4a

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