Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f69a30b4275fd9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-13 00:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 828a8c879ba0e9349b1cf9ca33bcb4b0 SHA-1: 3d67177329912a21010dd093b9a5e98496ccac3b SHA-256: 55f69a30b4275fd983bf597283f4f4f60411725f686444c7d0ddde6eebc3e329
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=4mat+learning+styles+pdf, which is likely used to direct users to a phishing or malware site. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's a wrapper for malicious links rather than legitimate content.

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.com/pify?keyword=4mat+learning+styles+pdf In PDF document text
    • http://files.simonsayskennel.com/uploads/1/3/0/8/130814411/kujofesufadanowa.pdfIn PDF document text
    • http://files.avidduomusic.com/uploads/1/3/2/6/132695629/nuberitoxositum.pdfIn PDF document text
    • http://files.sudburyrocksmarathon.com/uploads/1/3/1/4/131483143/0845ecd8d1de.pdfIn PDF document text
    • http://files.bunkyechohawk.com/uploads/1/3/1/4/131453536/cbd85e0acf395f9.pdfIn PDF document text
    • http://lupurudid.weformplastics.com/uploads/1/3/1/3/131398351/8403606.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/88779924046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/blade_runner_putlocker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/68042729614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/49810906627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/gexatoxafoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/wumovudufuvapoxulenulesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/tunukosekus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/54430554102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12457093378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/input_file_accept.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/sample_formal_letter_of_request.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/71319644818.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 5132 bytes
SHA-256: 9904bb2427688133b86a07c059efb1044e5cbf9c39035d7614fe6983430e4dbd
font_01_sfnt_off00007430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7430 10120 bytes
SHA-256: cd910c4e76b71c4d7c78a1f0e454a6c170a0209de887e006efcc880ca8166bd4
font_02_sfnt_off000096b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333