Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb57707fbf8f86e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-24 00:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6bb4d2795321a81c93c0b05de88b7df4 SHA-1: 5433460b70d62d7f7b34303454b51f3436df88b9 SHA-256: 3fb57707fbf8f86e128db9a47ff6d0fa1ad57f4c5c9eaf6192bc8058e743dcf4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=butadiene+rubber+sheet'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. The presence of many external PDF links also indicates a link farm strategy. No scripts were extracted from this sample.

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=butadiene+rubber+sheet In PDF document text
    • http://debebun.theright.us/uploads/1/3/0/9/130969724/4686627.pdfIn PDF document text
    • http://files.loneoakcemetery.org/uploads/1/3/0/7/130776445/mapobe_zozate.pdfIn PDF document text
    • http://files.mandyringephotography.com/uploads/1/3/1/3/131384468/malarumaguda-gifabesos-xunirofupa.pdfIn PDF document text
    • http://files.siddharthabhutantravel.com/uploads/1/3/1/4/131406234/1b9cebce8.pdfIn PDF document text
    • http://lupoxo.lydiamanning.com/uploads/1/3/1/4/131453494/0031352258.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/1/0434/4568/2328/files/30046422743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/vinux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/introductory_astronomy_and_astrophysics_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/wesasuzarusopikarum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5931/2800/files/fuxowuxogati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/kefutozaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5306/2046/files/char_broil_infrared_3_burner_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/all_algebra_formula_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/additive_manufacturing_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2075/3823/files/wogulesara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/china_visa_form_country_of_arrival.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/sifokejefatelevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/dslr_camera_photography_tips.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
🗂 Part of campaign: amusedowl.com 4 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6796 5072 bytes
SHA-256: e88fc6696151823f4a2999ee77736f3fc53abca3e3e34fcd83736ab7a98b36c5
font_01_sfnt_off000078b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B8 10828 bytes
SHA-256: 510115c1aa627899a1b400d3c61d171cb8cd9410d9cbcd452343c7d8b3c5ee3e