Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a9f0830ffe3160…

MALICIOUS

PDF

56.1 KB Created: 2020-08-07 23:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 276e7ec934e0e81edf02fa58dd60468e SHA-1: cbedb02a1ea1880608c47e233eb01468802e5b9d SHA-256: e9a9f0830ffe31602ea57a4bdd597ce8dda026d1ecad9f6fd6f15e458fe2d6cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, appears to contain text related to a textbook search, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=atkins+and+depaula+physical+chemistry+9th+edition+pdf
    • http://files.mirandamusicalsociety.com.au/uploads/1/3/0/8/130874338/fedasozu.pdf
    • http://lixapag.fear-less.co.nz/uploads/1/3/1/4/131407995/8480269.pdf
    • http://files.dbssstingsoccer.com/uploads/1/3/0/8/130813645/wefokapikifelugajate.pdf
    • http://files.be-the-space.org/uploads/1/3/0/8/130814126/9603365.pdf
    • http://fofani.rebeccagrahamgallery.com/uploads/1/3/1/4/131408027/vulubuxib.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/47906703805.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/dagimomiperejijol.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/nodakuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/thirty_point_buck.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/4114337039.pdf
    • https://cdn.shopify.com/s/files/1/0432/1918/9915/files/multiplication_and_division_of_fractions_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/trane_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/wegafutubovuzofigizemox.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/suzizakagudejuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/ritusobakidinajijavak.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1017/files/holy_cancer_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/79704666955.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/lotunudewatowaveko.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a7f.bin
95680f7c56b75fb59f6755ebfd81a8ee7e1a4be577761cb364c1827fa5e267ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7F 5704 bytes
font_01_sfnt_off0000adcc.bin
7ed257a7d2fab4b0ec75206636c439847bf554e162b364c13e55d1ff2a07f49a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADCC 11420 bytes

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