Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f50a1a5f3c919bc…

MALICIOUS

PDF

39.9 KB Created: 2020-08-20 04:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b871abfdbc1c30b601356def0a617eda SHA-1: 57b81524d5650d684eb5b9cb6046b0d63b1b3eec SHA-256: 8f50a1a5f3c919bc78115df8b3c40394d1562ecf887e89a89ebcccf75b60b350
194 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a malicious redirector and part of a link farm, aiming to direct users to harmful infrastructure. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=alimentacion+balanceada+pdf+minsa', which is flagged as malicious. This suggests the primary goal is to redirect users to a malicious site, likely for further exploitation or phishing.

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=alimentacion+balanceada+pdf+minsa In PDF document text
    • http://files.anoopbrar.com/uploads/1/3/1/4/131452988/vosefesona-totofefumibapim-rusiteviluwiv-jexiniwupe.pdfIn PDF document text
    • http://lunad.twooldmaresblanketservices.com/uploads/1/3/1/1/131164250/mokopebujonologaw.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/1/0435/7377/2447/files/67168667246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/nokitegebapadumigivikos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1010/4216/files/13216007508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/gomevebaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/nopubis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/fallout_4_settlement_management_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/bearing_catalogue.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 3

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_off00005e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E40 5332 bytes
SHA-256: e730319a08013686255f239da798b91a4dd08bf89e5aa02b48df7425ceb2506a
font_01_sfnt_off00007041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7041 10288 bytes
SHA-256: 10bf8985444300f14cc9dae002e98a8621f4480c9f720f646f034452b5201860

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