Malicious PDF — malware analysis report

Static analysis result for SHA-256 7101a5a8bbfe9a66…

MALICIOUS

PDF

57.6 KB Created: 2020-08-06 23:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77aacb68e175533d44e8cd2dd49d9b0b SHA-1: a2e895307cdf2a533d92a00cccf5671dbe06aaa9 SHA-256: 7101a5a8bbfe9a66c352cee76445e04f6b7cc63b75ee6eb6b889e3bcc142b7fb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it is the primary lure. The ML classifier also strongly indicated maliciousness.

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=multilevel+association+rule+mining+pdf In PDF document text
    • http://files.diybuilds.ca/uploads/1/3/1/4/131483337/dukugo.pdfIn PDF document text
    • http://files.ekamniearth.com/uploads/1/3/2/7/132740275/19f337f04c42.pdfIn PDF document text
    • http://files.davideagle.ca/uploads/1/3/2/7/132712093/xejinurubutem.pdfIn PDF document text
    • http://files.lonestarcarpetcare.com/uploads/1/3/1/4/131453247/483786.pdfIn PDF document text
    • http://files.antoinegindt.com/uploads/1/3/0/8/130814298/6571663.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/1/0430/0885/2117/files/33461014206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/6th_pay_commission_full_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/zogapuvexik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/83046082967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/29615897486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/8786409371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/advice_on_products_and_services.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/96856261478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/apple_genius_training_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3830/1590/files/71049846607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/38598994085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/nituritakosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/gegeg.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_off0000a3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C9 5540 bytes
SHA-256: bdccc7eea08507a1a4105c9c5de3cb02bf0757e4ce0489904e2e5b6bd66e9630
font_01_sfnt_off0000b69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69F 10236 bytes
SHA-256: a330f815f79b86bd706a3d707b72f5bf0c4b7c5c0d7d4604377d118e976311e2

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