Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c89e038c09e821…

MALICIOUS

PDF

56.2 KB Created: 2020-08-05 09:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73c2582f3fceee93ea8a86a0619b8b24 SHA-1: b8e2c73e37df528f69e73cf4ccf5dfb77f481741 SHA-256: 60c89e038c09e82148543e98312d4ff5448c59179398f6e8e153f01a990574ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to a link farm hosted on Shopify, and one critical link to a known malicious redirector at 'ttraff.com'. This indicates a likely attempt to redirect users to malicious content or phishing sites under the guise of academic material. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=cerebral+circulation+physiology+pdf
    • http://files.dennisoreilly.com/uploads/1/3/0/9/130969572/jager.pdf
    • http://files.kcorneliusimagesandmarketing.com/uploads/1/3/1/6/131637273/6192374.pdf
    • http://files.mikebernalmedia.com/uploads/1/3/1/4/131453894/2218119.pdf
    • http://files.susanprolman.com/uploads/1/3/0/7/130740623/giwemif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/dukeputusuruxinuzej.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/dokupapapoko.pdf
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/81343444090.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/minodaduzero.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/jumojebowemazupiwudepuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/nateta.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0400/1443/files/autobiography_of_red_anne_carson.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/36348107880.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6330/files/pabowiwekufobesalit.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/gekavulotoxijadupivijiba.pdf
    • https://cdn.shopify.com/s/files/1/0438/0029/7633/files/how_to_host_server_on_github.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/vozowotekobonuxosoredasa.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008832.bin
50cc7e4bc68fc88ebadc0962d6d516f3b301c74fd6a8d0da6810206c86712451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8832 5564 bytes
font_01_sfnt_off00009b16.bin
f1a1ceaaf92bf3220466828356cffac06f7523a986f76cf86614c0bb4c4b7980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B16 10256 bytes
font_02_sfnt_off0000be62.bin
ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE62 16148 bytes

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