Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef1ad6783ede52f…

MALICIOUS

PDF

47.8 KB Created: 2020-08-08 05:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cdf600f93f551f445d31e76b94ef3edb SHA-1: a1492fa1b6254805240770fb0b0162eb844e1c2b SHA-256: eef1ad6783ede52f36a5f4ff493ff3d72d34cc2fbf97137a2da32a6deece7b12
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=car+maintenance+checklist+pdf`. This indicates a phishing or scam attempt, likely using the 'car maintenance checklist' lure to entice clicks. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirector links and the overall suspicious structure.

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=car+maintenance+checklist+pdf In PDF document text
    • http://files.multifloraplants.com/uploads/1/3/1/4/131437983/jipulifetinu.pdfIn PDF document text
    • http://files.apollopresby.org/uploads/1/3/0/7/130740180/3f53e4a.pdfIn PDF document text
    • http://files.texasdispro.com/uploads/1/3/2/6/132681863/vukizi.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/1/0441/0834/9592/files/perireja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/99887406137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/buenos_y_malos_habitos_alimenticios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/5576/9758/files/2020_may_calendar_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/23539303709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/9010986253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/mesavugujofofuxodegofevug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/34109803071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/16620758447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/39131522115.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 7

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_off000071d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D3 5160 bytes
SHA-256: e0e11cbc1ca673363de31ce10d10be3e6c8d838fb5270f833360b7ecb6db3f0c
font_01_sfnt_off0000832d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832D 9856 bytes
SHA-256: 60de0d80dc287c72c6db47c51e54de240249b9b9bf7ca4f110bf41305097c0a4
font_02_sfnt_off0000a4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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