Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5c634a5ac5565d…

MALICIOUS

PDF

45.5 KB Created: 2020-09-02 13:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e236dcce742405a45e78f402cad6db33 SHA-1: da733955bda90bdda1a94d61e68ed849903c8ea9 SHA-256: 0f5c634a5ac5565d5aeb3c13d4a3880b8038601a3270b1fda0889c15bcff5838
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, pointing to a URL that appears to be a lure for free software. The document body, though heavily obfuscated, contains the same URL and a list of other PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL, which likely leads to a malicious site or further payload.

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.link/wix?keyword=online+bible+for+mac+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/five_feet_apart_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/3129/6160/files/48082802914.pdf
    • https://cdn.shopify.com/s/files/1/0431/7066/0508/files/gabevu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5039/files/6625031907.pdf
    • https://cdn.shopify.com/s/files/1/0461/3744/2457/files/barbarian_assault_defender_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0430/2058/3065/files/sql_server_2014_express_x64.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/pabipegemigeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/composite_layering_technique.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8592/files/42367235297.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/tagularukotuvimudusuredut.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/kerogovowufumirezufeboto.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/xobaguxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/fight_song_easy_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0294/files/como_activar_letra_capital_en_word_2016.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_off00005e4d.bin
68f6d10b18f2343b2be65a35e72e7be3b7cb389227e643b4576ebee86b015a56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D 5016 bytes
font_01_sfnt_off00006f40.bin
a844499312b90ca643c749742d1b2fe0d55a34e3279c2c4ac44543a2ab9f4598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F40 10668 bytes
font_02_sfnt_off000093f7.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93F7 16144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.