Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be863738a2f13ce…

MALICIOUS

PDF

43.0 KB Created: 2020-08-27 15:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aa7bbfd5e828fa4e951509d9fc31a1a SHA-1: 8f250e4fc84b71ff3988c8d1000a71cacf80894e SHA-256: 4be863738a2f13cebf0b3deaa81188e5a58eca4dcd9781a71a247576c52d84d2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=goodix+touch+driver+install', is designed to trick users into downloading a driver, likely leading to malware execution. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to shopify.com, though most of these appear benign. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=goodix+touch+driver+install
    • http://wizup.soulsearchrecords.com/uploads/1/3/2/7/132712354/xijidib.pdf
    • https://cdn.shopify.com/s/files/1/0446/3312/9123/files/benedetti_poemas_de_amor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejolezogumulugadajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/nozeliremowafilawar.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/donuxifoviluxevisagisasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/kafudodaboputasivewesab.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/benzimidazoles_synthesis.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/acting_tips_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/dekakidirelumanubof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9676/0730/files/50786178581.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/kafudubugaduxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/snoop_dogg_doggystyle_songs.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_off00006a29.bin
454b4a803ea1ed3fc15cee9eaee44d26b6c408e355e3485dad1f09ee60e8b901
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A29 5184 bytes
font_01_sfnt_off00007bcf.bin
268e70310f9cafa1d77c45e620fd8d7bce8c822f187b636573950d2172608541
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCF 10512 bytes