Malicious PDF — malware analysis report

Static analysis result for SHA-256 93db9d729131e06b…

MALICIOUS

PDF

36.4 KB Created: 2020-08-16 15:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50507af072fce99da712c54100b0428d SHA-1: 7bd9ede9f6a5e841d1ab7aff76d2027e7f50005a SHA-256: 93db9d729131e06be708340479e7c59b34920e3dd72be34e5668e65eedd29df3
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at ttraff.ru, which is disguised with the keyword 'acrobat pdf reader old version'. This suggests a social engineering attempt to trick users into clicking the link, likely to download further malware. The document body, though heavily obfuscated, contains the same URL and references to 'acrobat pdf reader old version', reinforcing the lure. The presence of a link farm further indicates an attempt to manipulate search engine results or distribute malicious content.

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=acrobat+pdf+reader+old+version In PDF document text
    • http://files.saintanastasiaschool.org/uploads/1/3/0/8/130874567/bamavugezofazadonav.pdfIn PDF document text
    • http://dimiso.gdinteriors.ca/uploads/1/3/1/3/131379759/ce55df7879b.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/1/0431/3664/7317/files/filufuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/14367985882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/carte_du_monde_a3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/vumupisawipurakusenasoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8178/4726/files/chromosomal_disorders_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/abundance_chakra_healing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/rondo_capriccioso_saint_saens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2994/3704/files/pogedimodopiragabil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/jatipoxofadimeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2716/1507/files/65986448048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/pibevulus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6381/1999/files/reliability_of_safety_critical_systems_theory_and_applications.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 1

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_off00005041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5041 5340 bytes
SHA-256: c80eecbc461a78cb0682273e6e290aefa939fc95d559d292d54814f2181ec5da
font_01_sfnt_off00006278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6278 10020 bytes
SHA-256: 11c3fa710cdf927af1b1702618c29ec1b213191849c933d51bc899f8227c810d

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