Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b3d1185ca32632…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 06:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2cfc175d5f52be6b76ceff9ae6d99e1 SHA-1: b14a45a9a318f131ca1a7345416ad97ba602e6e2 SHA-256: 79b3d1185ca326329f8974ee72c9cef2dac1d610f963e654dc558caaf28b0157
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to host phishing content or distribute further malware. The document also features a large number of external PDF links, suggesting an attempt to manipulate search engine results or create a link farm. The ML classifier 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=br%25C3%25BCche+addition+subtraktion+pdf In PDF document text
    • http://files.kyeemaridge.com/uploads/1/3/1/3/131382330/2979508.pdfIn PDF document text
    • http://files.wisdomforwarriors.com/uploads/1/3/0/8/130814980/4aae0c8efeeecc8.pdfIn PDF document text
    • http://files.schec.net/uploads/1/3/1/8/131871894/6851944.pdfIn PDF document text
    • http://files.mindpractice.it/uploads/1/3/1/8/131856271/4118360.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/1/0432/6935/7728/files/pilukafavewufudutup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/43531695216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/15011879443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0278/0072/files/terraria_creative_mode_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/direct_tv_rebate_form_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/refejobukugejumasezikarip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/povonetokizudinupafufav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/parimizexosovudavol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4134/7994/files/77553466236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/contrato_administrativo_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/10307728497.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_off00006c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9D 5584 bytes
SHA-256: 7c4459ab76115f2159889b3bc017b9c9a04dd6a1e1dea3ae02963de215de5346
font_01_sfnt_off00007f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5A 11172 bytes
SHA-256: 5b13cc75f828d577ce658f07efeced2e9251f409a4a332ec326adf97936821ea

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