Malicious PDF — malware analysis report

Static analysis result for SHA-256 475785f5465760de…

MALICIOUS

PDF

53.1 KB Created: 2020-08-31 09:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd5d17f4f9dbee35f0f885629d54970a SHA-1: 682ed68fa9381b6cef8b139dd8561984c0ece961 SHA-256: 475785f5465760de9eda7583e3ca19496aa9e8e25da99fd5035d5319df26ed72
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.link/wix?keyword=365+tarot+spreads'. The document body, though heavily obfuscated, also contains references to '365 tarot spreads', suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final destination. 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.link/wix?keyword=365+tarot+spreads
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/gomixalokomika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/22233481798.pdf
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/lukez.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/xodopofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/33073353275.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3144/files/28558785971.pdf
    • https://static.usrfiles.com/ugd/b8c837_c00feb33403a4c248692be03764dac24.pdf
    • https://static.usrfiles.com/ugd/32777b_8855985412894a9eb679c66fa52e59c9.pdf
    • https://static.usrfiles.com/ugd/b910ae_c6eb04a51a9e472093b96b05a9efdec3.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/volalawire.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/33147310182.pdf
    • https://cdn.shopify.com/s/files/1/0465/3200/1950/files/drafting_blouse_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/50450456307.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/definition_of_proximate_analysis.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_off00008595.bin
9b27c5c7e5e21b7a2a6007d4a4fad939521e3cfe6f980bede27fb579ddec9061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8595 4900 bytes
font_01_sfnt_off00009637.bin
65c1ee685bb75046e18cd483362b839cd49c9a82f6a7778c273e366596dd0d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9637 10332 bytes
font_02_sfnt_off0000b997.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB997 4324 bytes

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