Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3dd83a3300c9c1…

MALICIOUS

PDF

86.2 KB Created: 2020-08-01 14:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 158898f853b50866c0418e0604f58bfa SHA-1: 815cf270aef572a08c72c5a2b694d847061eb2d4 SHA-256: 4f3dd83a3300c9c1368d804df51cc6b6bb25b378c493f240dd14668bf6e8b59c
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links that redirect to a malicious URL, likely for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a coordinated effort to lure users. The ML classifier also strongly suggests maliciousness. The document body contains obfuscated text and a URL that appears to be part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=steam+client+console+commands In PDF document text
    • http://files.dlogiceu.com/uploads/1/3/1/4/131437376/vodozaxufu-vesurasud.pdfIn PDF document text
    • http://files.lastarterseries.com/uploads/1/3/2/7/132741764/durosuxodo.pdfIn PDF document text
    • http://files.cowboycookinwickenburg.com/uploads/1/3/1/4/131408798/8478c.pdfIn PDF document text
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.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/1/0429/4161/2199/files/20852402101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0528/8349/files/wakaxukixedunibiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/serebixikati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/lepajaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/tilobojota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/wukab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/40280347928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/55559583077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/dedikiwaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/8050439347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/tizipalamasapab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.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_off00010615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10615 5092 bytes
SHA-256: 47bacbd6cca5e75c77f8f5f394ac160e245cc9bd8c2ac49e35389c9102330980
font_01_sfnt_off00011752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11752 16820 bytes
SHA-256: a4718ad664763b0c44334684690c90fd3e210682be6140474b732424c36cc7ce

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