Malicious PDF — malware analysis report

Static analysis result for SHA-256 26255f52d4b61f84…

MALICIOUS

PDF

44.5 KB Created: 2020-08-19 16:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ace3729aecc2324e73043c7133ed763 SHA-1: 6a23cfabf9bb5297da47b1b2815c407377573a0e SHA-256: 26255f52d4b61f848206c6b1ddcf18e8d78095f7ad8539fd587149e52c3dfaa3
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (`ttraff.ru`) that is flagged as malicious. The document body, though heavily obfuscated, contains references to 'Bittorrent android save location' and the malicious URL, suggesting a lure for users to download potentially harmful content. 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=bittorrent+android+save+location In PDF document text
    • http://zuparam.lifeword.nl/uploads/1/3/0/7/130738714/xagibukugi.pdfIn PDF document text
    • http://xiweduji.peacekeepersinc.com/uploads/1/3/1/0/131070115/bovutowojasugu.pdfIn PDF document text
    • http://files.nadinemanion.com/uploads/1/3/1/4/131437881/zakatizow.pdfIn PDF document text
    • http://files.drhannahcurtis.com/uploads/1/3/2/7/132740545/lazilip.pdfIn PDF document text
    • http://files.madolifarms.com/uploads/1/3/1/4/131437699/wemopibizemapo_dadatexi_jijuwunepiv_vibezasuduluk.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/1/0435/4503/4911/files/15009697373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/boeing_ethical_business_conduct_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6464/6037/files/83614742624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8558/4792/files/suzofegitidunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9975/4397/files/arthur_conan_doyle_the_lost_world_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/97062454163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/bedenkenanmeldung_vob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/7789032273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/getefisojuxovunitapeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/burexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/92825381162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/31077435666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/32903660831.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 3

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_off00007061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7061 5040 bytes
SHA-256: 3d759d2fa6bcd73cf8331fc087ebbb45a0746772b7e074efb277ede07080188c
font_01_sfnt_off0000818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 10364 bytes
SHA-256: 62d5687d65c1d23306e049dba5cbe74f47ce617d0505ed0ea7cf128a5d1287fe

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