Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93b52f61172cbb2…

MALICIOUS

PDF

146.5 KB Created: 2020-08-05 14:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1864e91f66a0e71518bd0d4d5f8f765d SHA-1: efaf9f1c27fe618b682199b15bb94ef1f7d6f119 SHA-256: c93b52f61172cbb23c8433615eaa1890d453e8d2d4e1fa9123f2d1cbc8e94fae
134 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.ru/pify?keyword=recirculating+aquaculture+systems+2nd+edition+pdf', is directly associated with this malicious activity. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=recirculating+aquaculture+systems+2nd+edition+pdf In PDF document text
    • http://files.paperclippenguin.com/uploads/1/3/0/7/130739180/lubosorubirabox.pdfIn PDF document text
    • http://files.oilmonkees.com/uploads/1/3/0/7/130775222/kasumulapufunedijeti.pdfIn PDF document text
    • http://files.antoniocoach.com/uploads/1/3/0/9/130969249/redoburetoxesox_nodoxowu.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/1/0433/7513/2824/files/53653289727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/2509579639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/die_woodys_fichtl_s_lied.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/92403300639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/gijiwebuzodazepuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/44212730337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/data_abstraction_and_problem_solving_with_c_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/91203231304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/9737519554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/28397911339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/metuzomeniwuwud.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 4

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_off0001f0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0CA 5724 bytes
SHA-256: b33fd2e7ee6fc9ede7ac3dffe183b9522db87475be25588324a9bc8b749e039e
font_01_sfnt_off0002042e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2042E 12832 bytes
SHA-256: 9e4ab3a7bf7cc638d294cba9442101bdd8dbef36b163f19ca3dcbe458a66fab0
font_02_sfnt_off00022d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D6F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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