Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd356c6a655e87a3…

MALICIOUS

PDF

76.0 KB Created: 2020-08-12 05:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a83b99eb84f47f3849570d741dd53b2 SHA-1: d883c9773d15cc53b726bbc6ab492bfb62ad6599 SHA-256: cd356c6a655e87a3f3014b1654cfcc080684a045183f9c8556878c29499ca6f9
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector at 'https://ttraff.ru/wb?keyword=what%20is%20inductive%20reasoning%20pdf'. The document body, though heavily obfuscated, appears to contain the same URL. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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/wb?keyword=what%20is%20inductive%20reasoning%20pdf In PDF document text
    • http://files.authorbellabryce.com/uploads/1/3/1/4/131454065/xisivuguwep.pdfIn PDF document text
    • http://files.authorrebeccaarogers.com/uploads/1/3/1/6/131637034/wakobobo_jujorufaxeso_puxul.pdfIn PDF document text
    • http://rumuka.whoisnecessityschild.com/uploads/1/3/2/6/132695492/xadukuju-rabonado-felapan.pdfIn PDF document text
    • http://getim.runningfromanxiety.org/uploads/1/3/1/3/131383548/lojabojow.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/1/0428/9419/6902/files/hoover_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/gastroenterology_clinical_cases_uncovered.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2295/4141/files/cardiopatia_coronaria_fisiopatologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/dutufuwovelekosinurelij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/takujubelajivonebavemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6712/7446/files/96284616296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/94423587607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/78135981639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/zebotigirexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/wenavumorudukujipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/bowflex_xtreme_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/ar-_15_rifle_builder_s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/kemes.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_off0000ec21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 5460 bytes
SHA-256: 80db1aaa3d3997a1d30926fc4ca33cb662c0ea65c2ad05f7b7c2e74105ec9249
font_01_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 10456 bytes
SHA-256: a75d45045b2a57f21d518fcaff01f4a5d74f7761f7ecd004f2ef1286582305c6

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