Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9cb153881b0ebf9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-12 01:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 929fd020a44a0ac3bc12db99cfefb4d7 SHA-1: 2e95311e864c776efa56906f72c5b3f17fd34724 SHA-256: b9cb153881b0ebf93445bce6dafec16132aff18f6765f94aaa9de5a47cc40433
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is likely part of an SEO poisoning or link farm strategy to drive traffic to malicious infrastructure. The document body itself is heavily obfuscated and contains the primary malicious URL.

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=prontuario+cemento+armato+santarella+pdf In PDF document text
    • http://files.tedxparkcity.org/uploads/1/3/1/8/131857544/napekizi-getubi-wijavomelonuna.pdfIn PDF document text
    • http://files.tweedvalleyhapkido.com/uploads/1/3/0/7/130739776/68e80.pdfIn PDF document text
    • http://files.speedwayandroadracehistory.com/uploads/1/3/1/4/131407952/7376293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/momotoxixalilosisafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7232/9630/files/tove_lo_habits_remix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/nokuwasagoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/bossypants_tina_fey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/66232714835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/dotuledidapaxobaneruruge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/wumibufokepibofenabej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/64730635909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5406/9925/files/46921974164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/architectural_lighting_designing_with_light_and_space.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6248 5184 bytes
SHA-256: 3e2d9431389380c83d5b0e10c9da3b40ea00d0f176e878e511a60990f0ae0002
font_01_sfnt_off000073cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CD 10724 bytes
SHA-256: c28809329d5ace8af73a2c701ee372c089c5ad4c6c0855da881cb205bcdbf281
font_02_sfnt_off000096ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.