Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d1c54b8b81d78c…

MALICIOUS

PDF

87.4 KB Created: 2020-08-03 19:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f6ca8ab7cbcb8be147586f61b516b8e9 SHA-1: a649c1494bfb95dd8660014e0704ea18ffadb42e SHA-256: b5d1c54b8b81d78cd557f4d05d8e9802ae011c6904b522515543996b1b9fb10f
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the text 'Literature review on annona muricata pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=literature+review+on+annona+muricata+pdf In PDF document text
    • http://files.brrclub.com/uploads/1/3/2/8/132815343/9924451.pdfIn PDF document text
    • http://files.kathrynkohorst.com/uploads/1/3/1/6/131606343/fisuxovelotiki_gugulozafari_zijagi.pdfIn PDF document text
    • http://files.dlaf.org/uploads/1/3/0/7/130738894/bakefenonef-gexofuv-sipubedin-vesowiv.pdfIn PDF document text
    • http://files.indypolevaultjumpscamps.com/uploads/1/3/2/6/132683334/supuduxezok.pdfIn PDF document text
    • http://files.nadeemkhan.net/uploads/1/3/2/6/132695714/nazurira.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/1/0435/4224/9631/files/54024144724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/substitution_property_of_equality.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/46854347195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/73920807720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/75847198374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/sarotej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/wetugigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87743453122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/lojutomufufupudesobif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6980/9575/files/feloposezegetomeliwudeg.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off0000f926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 5184 bytes
SHA-256: c2e5abfb70a821fd7d7f121d406c1b26679349aa25c8c5f367d68a08d9ab83d6
font_01_sfnt_off00010ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD2 15416 bytes
SHA-256: 35f09c6098b01b677cfa21d039b6d15de49f6cbef06508671dd4c641935ee488
font_02_sfnt_off00013b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B16 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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