Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4b5b1916e9dcb3…

MALICIOUS

PDF

53.1 KB Created: 2020-08-24 00:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ebd523f10f9cabb054218be3f34ec67 SHA-1: d1f80f2c1bb8a6a460654e7e9b2cd22abb855d0e SHA-256: 0a4b5b1916e9dcb3ee9508db34fa72bfdcf41526fa1fb5815e6dfd1e3d9a2ec9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text referencing 'Raid shadow legends guide first champion', suggesting a lure to attract users. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy. No scripts were extracted, but the primary attack vector appears to be directing users to malicious content via embedded links.

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=raid+shadow+legends+guide+first+champion
    • http://refipibo.athascomms.com/uploads/1/3/0/8/130813042/limozebixan_kibazezokib_pozatu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/93328610678.pdf
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/adjectives_worksheets_for_grade_8_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/purble_place_game_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/92720318805.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/47691347999.pdf
    • https://cdn.shopify.com/s/files/1/0436/1083/3058/files/nujugozujenapebokekut.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/2nd_grade_math_worksheets_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/wojunebixuneduzavakif.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/bigazizepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/automata_theory_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/que_es_coaching_ontologico.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://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008059.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8059 6440 bytes
font_01_sfnt_off0000904d.bin
27c60e4291d92c70b52fafe0b242872b81036ea39e1c6f8c480794124e554f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904D 5668 bytes
font_02_sfnt_off0000a382.bin
7d8056c47203ceddb1b327cf23a0251cdaf7d4340d72ab9fe86e65d894a57461		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA382 10420 bytes

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