Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a17dadc26dfcdc…

MALICIOUS

PDF

39.8 KB Created: 2020-11-04 01:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 803a38f53ffd192f32fa9370e3b8aa12 SHA-1: e561cadf18da0c0bb4d759149225b5460b687791 SHA-256: 06a17dadc26dfcdcc4c3ce37ed097f61dffee0bf09ac8a5729cd836c8b8cfbea
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/123?keyword=dover+sherborn+middle+school+sports', indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains similar URLs and text related to sports, likely serving as a lure.

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.cc/123?keyword=dover+sherborn+middle+school+sports In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f885dcd9f58c.pdfIn PDF document text
    • https://sebidodeg.weebly.com/uploads/1/3/4/4/134438526/melazaxafalume.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/bba0b.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/pijub-nabekidedubun-xumupo-boremurepame.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/7292536.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/bohemian_rhapsody_easy_piano_sheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/game_clicker_bot.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/prentice_hall_algebra_1_answer_key_chapter_6.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/link_a_in_squarespace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46f66a3-3aeb-4f81-8a03-8892f6f195ec/masonelajuvepexubuk.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9F 5304 bytes
SHA-256: dd5e76069164d4ffcf9d06898200e4bd2a2e4a038e803e34cd4422f284de41ff
font_01_sfnt_off00007085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7085 10060 bytes
SHA-256: 0f4b320376cf39821b5f0e11e015155f0d10a25749fb935b3008717ebec3b034

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