Malicious PDF — malware analysis report

Static analysis result for SHA-256 08373c3dc92c2aa5…

MALICIOUS

PDF

43.7 KB Created: 2020-08-23 09:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c45e2d09eb2a11a428b384dd07b564b4 SHA-1: babbe3f431157013d26ff8954396654d302ecfc9 SHA-256: 08373c3dc92c2aa54f3a4d464da013e1c77b10e6fa41478f9463ffc8b60286f0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though partially obfuscated, contains the target URL, indicating an attempt to direct users to malicious content. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=chapter+20+acids+and+bases+worksheet+answers
    • http://files.coolcaribbeanvacations.com/uploads/1/3/1/3/131398507/8146566.pdf
    • http://files.iananthonycoleman.com/uploads/1/3/0/7/130776718/9342694.pdf
    • http://kowaban.nationincorporated.com/uploads/1/3/1/4/131453050/vuwomu-zuwumapupulozak.pdf
    • http://files.mrnicecream.us/uploads/1/3/0/9/130969633/9aec13d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/blender_3d_incredible_machines.pdf
    • https://cdn.shopify.com/s/files/1/0429/2735/8115/files/autumn_leaves_easy_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/79940921068.pdf
    • https://cdn.shopify.com/s/files/1/0440/3603/0614/files/bapufegunajexanavunogafup.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/83477396289.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/agrarian_reform_law_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/79556588302.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/jedokiwer.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/52033770416.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/16022407585.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/calistenia_ejercicios_en_casa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/vesipufosogosajazuka.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b42.bin
8b1ef4d95bb422259bbbdeba27fdd4dd97493d2afc8fb73973f6445238203dd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B42 5604 bytes
font_01_sfnt_off00007e55.bin
335dcf9ef0413fe3b5e97c33e97726539f54b8d36ef77cb3ac549e01d9747f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E55 10304 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.