Malicious PDF — malware analysis report

Static analysis result for SHA-256 6963a534ce695088…

MALICIOUS

PDF

46.7 KB Created: 2020-08-08 11:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c713f7efa07e940ca9b9ffa1235bca8 SHA-1: c245206d79937aecbb7932625e9bbde96d5fa9e4 SHA-256: 6963a534ce6950880d478c9459c6641524df0478cab667875eeb7a0d9e1c4a23
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 domains, suggesting an attempt to manipulate search engine results for the term 'pneumatic rotary actuators pdf'. One of these links, https://ttraff.ru/pify?keyword=pneumatic+rotary+actuators+pdf, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and benign Shopify links, reinforcing the SEO link farm tactic.

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=pneumatic+rotary+actuators+pdf
    • http://files.thewoodroom.co.uk/uploads/1/3/1/1/131164488/sogopewajabadujug.pdf
    • http://files.linensandlacefabrics.com/uploads/1/3/1/4/131407227/5621024.pdf
    • http://files.janinemercandetti.com/uploads/1/3/2/8/132814147/mopetarimiporen.pdf
    • http://files.healingneck.com/uploads/1/3/2/3/132303312/semejivabuzew_lefadowopidixe.pdf
    • http://files.nadinesmusicmanor.com/uploads/1/3/0/8/130814466/vilemesat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/geographical_information_systems_and_science.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7151/files/beastly_book.pdf
    • https://cdn.shopify.com/s/files/1/0444/6827/3319/files/origen_del_imperio_carolingio.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/autonomic_nervous_system_pharmacology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0445/8423/9268/files/itu_r_bt._709_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/birdy_wings_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/36499161899.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/96911824427.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/addition_subtraction_multiplication_division_worksheets_for_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/fawujomaxebaneb.pdf
    • https://cdn.shopify.com/s/files/1/0435/6499/0632/files/52230548850.pdf
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/sample_mba_recommendation_letter.pdf
    • https://cdn.shopify.com/s/files/1/0428/8816/7580/files/mefaleluzigakumivupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/bidunigepipofuneres.pdf
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/jerry_baker_23_blast.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_off00006a44.bin
832e65841834abfa10868bc0f3012c8866d8774ef44d244529aa890326aac216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A44 5256 bytes
font_01_sfnt_off00007c04.bin
2fe3162ab4230ce2ed55657cd9204ca07c55d411f848e665fb6e748cd532f004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C04 10288 bytes
font_02_sfnt_off00009f36.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F36 4324 bytes

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