Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c0728bd600738e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-28 15:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 214658f260314f7b46bd97e53bf5caca SHA-1: 47b4377a0eb2db4f725a60d27a4887041d734699 SHA-256: e4c0728bd600738eb50dd25dc4790225fbaab2e56a4090b0b3f8ebf9d84ada8f
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.ru, which is flagged as malicious. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking title, suggesting a lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.

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.ru/pify?keyword=html+and+javascript+tutorial+pdf+fre In PDF document text
    • http://files.bangkokfloatcenter.com/uploads/1/3/0/7/130739251/dofusoderefiponadogi.pdfIn PDF document text
    • http://files.eslboom.com/uploads/1/3/0/8/130814052/konamivitowododowuwu.pdfIn PDF document text
    • http://files.lavadaslens.com/uploads/1/3/2/6/132682235/3414056.pdfIn PDF document text
    • http://lerunodak.northpointebaptistministries.com/uploads/1/3/1/4/131409090/481e27d8c4.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/1/0436/0654/0445/files/74986099168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/79049115945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/jepamusuxikuzumafemezibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0780/9448/files/18518174780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/navigator_free_maps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/gexuwen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/kebubusugunid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1357/9423/files/80628764406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/lokiroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/3333093176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/gerademubaxopudijapedafuj.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_off00006277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 5396 bytes
SHA-256: c608b672e761d536cc19ff5d33c914e1ad8204872a7ee0e985424192c2d0802e
font_01_sfnt_off000074bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BC 10680 bytes
SHA-256: f940b3db47ca6e29ebc37d245d88f5724ccf2640fa7eea4e7a905ebe78bb26b8

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