Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf5fd16124482fa…

MALICIOUS

PDF

45.5 KB Created: 2020-07-24 08:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7f887a5742a900378d9b049bc75039b SHA-1: 6c2b5b786ccb8293da16c9bc341306106e12e85a SHA-256: ecf5fd16124482fa297a54e36b2285af465024820e17699ada45f9f819eb5465
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'ttraff.cc'. This URL is used in a lure related to a software installation guide. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=wily+introscope+installation+guide+9.+7 In PDF document text
    • http://files.healthandculture.net/uploads/1/3/0/7/130775704/wokopajububamaxipare.pdfIn PDF document text
    • http://files.futurereadyacademy.org/uploads/1/3/2/6/132682685/vuzaxizariforub-jegudoti-bemad-fozalin.pdfIn PDF document text
    • http://files.lwmphotography.co.uk/uploads/1/3/1/3/131383613/2421267.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/1/0428/9835/8432/files/xekugoxozeritazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/romapivod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/nuwoxelajezirax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/95957658391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/12660148691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/tobapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/jesapogonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/gidifiremawipugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/todoridikolirabolozik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/xorenemifibajojunupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/49652410088.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 6

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_off0000715d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715D 5504 bytes
SHA-256: acd14b924f84ad8458446600441f8791ee78fd37529b21bd3765f6c9bc2d8c83
font_01_sfnt_off0000843a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 10960 bytes
SHA-256: aabd266de3afe65cb8787f9bbb08e09fd577490e6232fb49268a7f1ca19b9601

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