Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93136fd3c64838b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 23:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 29c61aa70ffe7fbe4972954bd25c00a4 SHA-1: 28d03ec8bfa4df6e5c306815fdda9b3ee7ccdfad SHA-256: c93136fd3c64838bf15a276d75ef68d6c99f5f6ca5d91a1e44997104ad8dca8a
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to a link farm infrastructure (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, also contains the malicious URL. This suggests the primary purpose is to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, limiting further analysis of execution chains.

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=lista+alimentos+ricos+en+hierro+pdf In PDF document text
    • http://files.apriljonesms.com/uploads/1/3/1/6/131637257/mutoxefub-wenisufimiwev-wotixijiro.pdfIn PDF document text
    • http://files.daytonxa.org/uploads/1/3/2/7/132740892/razulibabozagini.pdfIn PDF document text
    • http://files.hannahdarcy.com/uploads/1/3/1/4/131437147/3e4a4227dc54.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/1/0434/4833/6536/files/zaxelijifapisoxuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/79699574428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/xudetadepururafagiliwodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/bojenisoriremapuxefuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/49418993274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/lufojagupiwikekudafubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/74879656429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/33205028666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/werete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2020/6758/files/rulox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/vanogufososo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/27013857181.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_off00006210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 5336 bytes
SHA-256: c0e559aa0dee116d8012773bde0d6c216f44bb418e665cd9dd2d22c81f61218b
font_01_sfnt_off0000740c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740C 10196 bytes
SHA-256: 270595aebec6d5aafc3b4d2b61c0344b87c705a8a20ff87214c8feeaa63cb520

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