Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b100f77027c51e…

MALICIOUS

PDF

78.3 KB Created: 2020-08-11 14:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 085ef58daaf224fa8b7f652310ab416b SHA-1: b29f21f8a9aa22c2f09543fd0bc884473a02a13e SHA-256: 76b100f77027c51e4dc7d9a409f3a1e8345b6b54f1d4a84b3b46378794ce8185
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. This indicates a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=edema+agudo+cerebral+pdf In PDF document text
    • http://piwasov.alekkosinski.com/uploads/1/3/1/0/131070374/fugorenonofeva_kededamiwoxi.pdfIn PDF document text
    • http://damonodad.dses.ca/uploads/1/3/1/8/131857631/7116732.pdfIn PDF document text
    • http://files.diamondbquarterhorses.net/uploads/1/3/2/6/132681670/lakinuginukovo_jikol_pafitabiru_jevozujekibu.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/1/0433/0687/7080/files/5137558887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/63352967803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9978/1275/files/devereguvara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/duwevewenoxixumipapinelad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/93860964498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/nys_45_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/81804871060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/95407155367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/pengaruh_letak_geografis_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/zivanisedam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/tosigegodidazuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/14441832419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/types_of_dental_composite_materials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/fixawuwozopedibebi.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_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 5396 bytes
SHA-256: 01738a4faa0e01943f1304f951fec32308d69606fac7a79d62cd7b4aefedef3f
font_01_sfnt_off0000fcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD6 15404 bytes
SHA-256: d5873375e5c1f07c8f2d48e59ca3946ca02f5762a4375578b2be6f7fcb2b0132

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