Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e6e306a8d2309a…

MALICIOUS

PDF

36.3 KB Created: 2020-08-29 08:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2e3b3648d4fdc16d248495b87da4617 SHA-1: 69851b3cab32926d9df3e681a6adaa341bf271a5 SHA-256: 99e6e306a8d2309a39f292e06188ca91288fab369bc14e98427ea4987c128d41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links designed to mimic search engine results, directing users to a malicious redirector at 'ttraff.ru'. This tactic is often used to distribute malware or conduct phishing by luring victims with seemingly relevant content. 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.ru/wix?keyword=managerial+economics+8th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/batman_arkham_city_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/mbbs_first_year_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/reality_testing_ability.pdf
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/wogiruxemasikinovuxemeka.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/do_the_harlem_shake_on_google.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/weather_underground_iowa_city.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/37387107780.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50971407729.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/95564850293.pdf
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/amiodarone_davis_drug_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/southwest_airlines_reservation_information.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000502f.bin
3061bbed05a579322216195a88183117dac98960040266484ef12d99e9131cc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x502F 5768 bytes
font_01_sfnt_off000063a1.bin
28cb44aaffe2fa6df53f12cb894ab124314b440db5de7b558206f8ee7d93c3ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 9692 bytes

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