Malicious PDF — malware analysis report

Static analysis result for SHA-256 347e724021eaab88…

MALICIOUS

PDF

76.5 KB Created: 2020-07-27 19:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6484a47c2d0e8fd1727f96e02bcbbdaf SHA-1: 8372c6fcbbcb3305c4dc9be01dd734088e7aa4b2 SHA-256: 347e724021eaab88697bb445e0c8b607a0b9898f3d527cd9a2f62e7fd97d9e20
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a download for 'Android sdk 28 free'. The document also features a link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation to increase visibility. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine further actions.

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=android+sdk+28+free In PDF document text
    • http://files.challengethewind.org/uploads/1/3/2/6/132695730/4477159.pdfIn PDF document text
    • http://files.icomos-sg.org/uploads/1/3/2/7/132710780/65d2c87d75.pdfIn PDF document text
    • http://files.elaionasfestival.com/uploads/1/3/1/0/131070481/4412699.pdfIn PDF document text
    • http://files.croftandwalker.com/uploads/1/3/1/6/131606115/2088269.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/1/0429/6415/6582/files/8236602672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/70701879466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/35733386319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/77673409673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/pekobojuwodubufumun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/tolonozolapaxesot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/woviwipepusine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/21523779403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/40047162771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/gewubavepepuvenaxipexuzux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/ruzufipitubibode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/mitalomufapekafoluli.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_off0000e687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE687 4748 bytes
SHA-256: 01e5fea351e9579901da2cdc4eb6f536e970b613d54abf0eaa2b9d104b142dc7
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 14660 bytes
SHA-256: 22feb6c74361fbe6f1027bdc83de440a33994ac46c94853bd1c62ac0d7c4517c

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