Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae6789f6309e8a5…

MALICIOUS

PDF

45.5 KB Created: 2020-08-30 21:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2944c721fc087c8b5febf2956b6f0a9e SHA-1: 7ef65c05aa7e436eb401ee2c3a46be8aebba24ef SHA-256: 3ae6789f6309e8a5990ac48594cc42a49e08b24a2f6b8c654bc66d6388bb18e3
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.com/wix?keyword=inside+the+house+of+money' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a coordinated effort to lure users to potentially harmful content. The ML classifier also strongly indicated 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.com/wix?keyword=inside+the+house+of+money
    • https://static.usrfiles.com/ugd/b8c837_651665ee4aa44d229104471d535dbb01.pdf
    • https://static.usrfiles.com/ugd/93c935_4936a88fe2284f4581075f8b82b340fa.pdf
    • https://static.usrfiles.com/ugd/1f2646_2d8e2cf824494bccbfdb813df80dac98.pdf
    • https://static.usrfiles.com/ugd/33ab24_8dbc0717666a451cb44804dd3469e841.pdf
    • https://static.usrfiles.com/ugd/3f80ec_5d3711c067084d219dcaad8e5125c2e6.pdf
    • https://static.usrfiles.com/ugd/b58d21_5827d60e58364bdfa1b9e5653deb6d1c.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_363e06a14f8845f28ab09deca7d134c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_04ba36cb25b14989b3ddd3fe3d2cb6fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4c465ee7e6a408c8d8be83b0200bc22.pdf
    • https://static.usrfiles.com/ugd/e3ff21_8afac34ad8874e69bbeff2b327a71ac0.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_44446b3c1a6a4b4ba78a40b073a90c71.pdf
    • https://static.usrfiles.com/ugd/2f07a1_72060ee64d6545ccb297b80c8d9126bb.pdf
    • https://static.usrfiles.com/ugd/77d535_1c2db44038c54c2c91e74ddfd853cd09.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e9a429be1e4763a90f3b4f09320ff2.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_off00006882.bin
8a0fa8ac957bc00f854a867cfa78e5928c0b47c0c4a7db5ead6c87aea7920d48
pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 4728 bytes
font_01_sfnt_off0000786c.bin
5d718a2bf9630a5eac540cf6dc8cbf4c2ca0637195be106b76480cd18a2b93be
pdf-font-stream PDF embedded font (sfnt) at offset 0x786C 10176 bytes
font_02_sfnt_off00009b4b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4B 4324 bytes