Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21b8e27539bafbe…

MALICIOUS

PDF

40.6 KB Created: 2020-08-03 01:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0159e2d9953898e13d2f3c0d645fece3 SHA-1: 7e5d79f7f317fd99d00a94b179019a68a5507a79 SHA-256: b21b8e27539bafbef10ab5fdc8c9e476846a79ac6b62d81c2e4b4cd92ad98698
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious infrastructure. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing its role as a 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=wedding+program+thank+you In PDF document text
    • http://files.ractproductions.com/uploads/1/3/1/3/131380521/nosizanerab.pdfIn PDF document text
    • http://files.joshualinkmusic.com/uploads/1/3/1/3/131379894/4a27a21d6b49.pdfIn PDF document text
    • http://files.annasofiestensgaard.com/uploads/1/3/1/4/131453823/538e5f.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/1/0429/7618/2426/files/52275670007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/32965695856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/robavapatukemekusoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/40903722510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4464/9630/files/74175318217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/digiriduwepagujezogogija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/xefefenuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/31263977752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/foerster_algebra_and_trigonometry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0278/0057/files/algorithms_by_sanjoy_dasgupta_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2117/0850/files/xamagelemagovodeloxawimuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/54229810830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2190/8640/files/6503827543.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_off000061bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BB 5340 bytes
SHA-256: 3e39c322259e8673f8323124787a27aa9f22f6c62c720d96399138de02354ad5
font_01_sfnt_off000073d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 9856 bytes
SHA-256: 541cda9f2295b6fc06d420646eb878b9f0e3e25b52de2458ab1e33a156a881f4

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