Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae84fc6595b4fd85…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 18:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3734a27721c7fbcc54465f06ade07c00 SHA-1: 8e2f1c572c76ff54a904f9642cd96ed45fa96e78 SHA-256: ae84fc6595b4fd85e52232431cbc36e9eaaad29b53074d22e53c4ab764321196
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure related to 'minecraft launcher 1.8.8' and embeds a link to a known malicious redirector at 'ttraff.cc'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the ML classifier strongly indicates maliciousness. The document body also contains the malicious URL and a list of other PDF links, suggesting a link farm designed to distribute malicious content.

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/wix?keyword=minecraft+launcher+1.8.8
    • http://www.minecraft-download.eu/minecraft-1.8.8.html
    • https://static.usrfiles.com/ugd/b8c837_e645b4ebe37341c98208593389752947.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_fa34a378c9c145659d236795dca21cbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc521717ca6b4144b1c2522fc09c90ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cfbb0cd28954f08be2aa5ff55d086c3.pdf
    • https://static.usrfiles.com/ugd/26481d_ae0af3f45f7f4b1d9d87cf4c8db28dc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_080ec4ffa03b4f358c3fdd87102182c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_271090167dc04bebafb0337794bf4f64.pdf
    • https://static.usrfiles.com/ugd/b8c837_043b03a4fe244744ae6adb5078defd7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b071211d68af4c7f8a6fe794621ad5f3.pdf
    • https://static.usrfiles.com/ugd/5ecadc_1302d2c79b0a49099a98dbd559ff548a.pdf
    • https://static.usrfiles.com/ugd/b8c837_65257470cdfa4353843b286775c9c074.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/beliweteg.pdf
    • https://cdn.shopify.com/s/files/1/0462/3404/2528/files/fishing_report_panama_city_florida.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5589/files/pan_acknowledgement_slip.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_off000064af.bin
9ef71800c682a75bb0d36a60034220dc4c04e2bad290cafc2c47701785d38e75
pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 5072 bytes
font_01_sfnt_off000075f0.bin
4fc62684ecd5306fa2c5eb88f67c40fb3df8d9cc496ddfa8ff9b3257ab097441
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F0 10128 bytes