Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d17dfdeaa1b52a7…

MALICIOUS

PDF

44.4 KB Created: 2020-08-24 05:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 596c071c5404b117ce2f39c5e8c3b010 SHA-1: c6b9907a9fff41529c2e03017524e8e77f0f8165 SHA-256: 0d17dfdeaa1b52a7a2273524494871e883b3b3eafd3ee88196ba71ff31a160e9
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify-hosted PDFs, and one critical link to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body is heavily obfuscated but contains the redirector URL and several Shopify URLs, indicating a link farm or redirection scheme designed to lead users to potentially harmful content.

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=keystone+snow+report+opensnow
    • http://vibolijus.theauburnmermaids.com/uploads/1/3/1/8/131857445/fimazetazigogakuwe.pdf
    • http://files.nadeemkhan.net/uploads/1/3/2/6/132695714/nazurira.pdf
    • http://giparafos.rachelsucklingart.com/uploads/1/3/2/8/132814930/7910859.pdf
    • http://files.crossfittullahoma.com/uploads/1/3/2/6/132695813/4170319.pdf
    • http://files.429delancy.com/uploads/1/3/0/8/130873708/9778697.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0452/6188/1506/files/apoptosis_y_abscisin_celular.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/xurik.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/abas_3_scoring.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/88114116111.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/christmas_brain_teasers_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/celery_juice_medical_medium.pdf
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/79795355354.pdf
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/jejixus.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/cvc_words_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/add_subtracting_fractions_and_mixed_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/fuxawonafo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ec.bin
d5a90d2ca885887feb5908b3b461c588538e08cccf7277725cf81329fe61328e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 4476 bytes
font_01_sfnt_off00007338.bin
feb036555f05fe19a9b657409b94dfaabad46b7a83e975dfe5cd5b307c9fd6c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7338 10288 bytes
font_02_sfnt_off00009674.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9674 4324 bytes

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