Malicious PDF — malware analysis report

Static analysis result for SHA-256 319cb5bb09152d6c…

MALICIOUS

PDF

45.5 KB Created: 2020-08-01 06:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f576c3ef98bdcede54e37162f64f822a SHA-1: e099ccf08ce5b987541e654387741a69a5805ef7 SHA-256: 319cb5bb09152d6c9139951a737eb381426d8008456f49d1795f7cab938ba599
194 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, a common tactic for redirecting users to malicious websites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=android+edittext+inputtype'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the same URL, reinforcing the lure.

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=android+edittext+inputtype In PDF document text
    • http://files.greatvalleyfarms.com/uploads/1/3/1/3/131379789/wufumo.pdfIn PDF document text
    • http://files.globalmathcollaborative.org/uploads/1/3/1/0/131070011/ce8c1ad467.pdfIn PDF document text
    • http://files.hemlockcanoe.com/uploads/1/3/1/4/131408280/muvijomuni_nubejurazavawup_dewojulu.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/1/0431/7223/3376/files/lugovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/57493278031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7644/2519/files/20946071829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/6963610891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9495/7470/files/13654066150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/navokapuvudibafib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/98102934796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/97732799695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/lawunobonelemurokuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/dakanurajisepuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/11500179392.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 5

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_off00006e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6F 4692 bytes
SHA-256: 692b2ba1c634d6a7497e44d1ca2fdd89218e7e3810e9200bd0ec165bcfc3c4b3
font_01_sfnt_off00007e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E82 13372 bytes
SHA-256: b27686f07294f39a4fd21f97f72e904144ff8a7a007cf2d0e2bd800d07cbe66b

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