Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a35bdfbfe0eec5…

MALICIOUS

PDF

42.9 KB Created: 2020-09-01 07:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fff1202de8e2cc8eda2258efa79e0af SHA-1: 1359d1c930f9f5876044511a91289a72a3f71983 SHA-256: 80a35bdfbfe0eec51a7980d3e263c00dac80b2a139308f9f5cb9018c4f30ed33
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Avast antivirus 2019 for pc', suggesting a lure to trick users into clicking the malicious link. The PDF also contains a mass external link farm, with the primary link identified as a potential malicious redirector.

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/wix?keyword=avast+antivirus+2019+for+pc
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/rekawijesuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8276/files/gixodetuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/40256512945.pdf
    • https://cdn.shopify.com/s/files/1/0463/4145/6029/files/axis_bluechip_fund_growth_factsheet.pdf
    • https://cdn.shopify.com/s/files/1/0465/1863/2598/files/bowflex_ultimate_2_exercise_routines.pdf
    • https://static.usrfiles.com/ugd/b8c837_c959401c0ceb4e5ebe8ae4b67ebb1093.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/american_gods_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0461/1227/6644/files/41913509844.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5108/files/boy_meets_girl_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/8792/8223/files/wotutexobolenomuwos.pdf
    • https://cdn.shopify.com/s/files/1/0450/3722/4094/files/hunger_games_book_1_download_free.pdf
    • https://static.usrfiles.com/ugd/4b874d_d7c3711c1e3846b3913a26a36a92288c.pdf
    • https://static.usrfiles.com/ugd/6116da_7a61755e027140cd92d8950a5a39a151.pdf
    • https://static.usrfiles.com/ugd/c20ea7_390f7b753a2c445ea8eb05fb702bea8a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c5d.bin
49955a1aa9e428d227cae9d96f50000a92ee7a63e69c1aaaed83f4268340620e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5D 5272 bytes
font_01_sfnt_off00006e53.bin
17a51b9f67159ba672227d14b21ca708282c3b65df7d84c96e53d882055f5dc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 10048 bytes
font_02_sfnt_off000090da.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x90DA 4324 bytes