Malicious PDF — malware analysis report

Static analysis result for SHA-256 51abada8a079d541…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 03:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 595c38ed04d2a3685a8eae3bbf113d85 SHA-1: 1989a7dec6331e29e6a409d2ae45d095e5aede01 SHA-256: 51abada8a079d5413a0b44945ede8d112365665d51dd8daaafc286e536a0618e
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a link to known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to temperaments, likely intended to trick users into visiting malicious sites. No scripts were extracted, limiting further analysis of the payload.

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/wb?keyword=temperamentos%20sanguineo%20colerico%20flematico%20melancolico%20pdf In PDF document text
    • http://files.cybelesings.com/uploads/1/3/1/1/131164355/5091700.pdfIn PDF document text
    • http://togebido.gracedesignliving.com.au/uploads/1/3/1/3/131381428/f204c98.pdfIn PDF document text
    • http://welofok.management101.net/uploads/1/3/1/3/131380429/2468644.pdfIn PDF document text
    • http://mawik.580california.com/uploads/1/3/1/3/131384244/857668.pdfIn PDF document text
    • http://files.enderbycontractors.com/uploads/1/3/1/4/131407278/1504428.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/1/0432/3550/8392/files/apollo_munich_health_insurance_claim_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7503/files/14065498014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/mathematical_statistics_with_applications_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0426/3585/files/free_brochure_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/3765170628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/volume_booster_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/70043790547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6431/8359/files/tidojazaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/61718316620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/fawoxujovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/vba_excel_save_as_and_email.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 2

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_off000066bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BC 5424 bytes
SHA-256: 0091d0eef384583517cd2cca9bb2a3231242f7f3251ae915b34d61a3058a2c43
font_01_sfnt_off00007911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7911 10860 bytes
SHA-256: 1efb19e9ac9997f0090d5df705fbb9b4c60e7f8e15d8b025e8b3448a285c4acb

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