Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6ca25499893a6b…

MALICIOUS

PDF

48.3 KB Created: 2020-08-23 01:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c269e40b7630ea9fa6594caf4c4ac7e9 SHA-1: 2d741097ef59ce8346881e3a8420fba74a3a848f SHA-256: 4f6ca25499893a6b7c199b5a5fd97aaac7af597d6a1f54f6a76ab32c60a83cb7
202 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into clicking through to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'face recognition password software free' and a call-to-action phrase, suggesting a social engineering pretext. The presence of a mass external PDF link farm further indicates a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=face+recognition+password+software+free In PDF document text
    • http://mubifa.st-agnes-international-church-kyoto.com/uploads/1/3/1/4/131453060/1820546.pdfIn PDF document text
    • http://files.emperrial.com/uploads/1/3/0/9/130969811/e378aa0d31cd.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/1/0434/4145/5256/files/telugu_movies_2018_hd_jio_rockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5430/9274/files/system_administrator_interview_questions_and_answers_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/27120046650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/28704343970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8725/files/93103850218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/49367444547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/3323630494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/22994982391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/1497038011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7428/files/meaning_of_social_sciences.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B1 5336 bytes
SHA-256: ae62a1a3331289e96e319df86918a7c458bf5066cfec938d6df8c017c9e6a9ef
font_01_sfnt_off00007afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 10592 bytes
SHA-256: 9e92800103d4ba4181666d37662c23b45a380627ee29e96a9656d1bfa3c3470f
font_02_sfnt_off00009f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6F 16068 bytes
SHA-256: 9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6

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