Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a0cbd7599e6b3c…

MALICIOUS

PDF

43.3 KB Created: 2020-08-31 17:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cc2936c724bd000d9ede37c573fdc3f SHA-1: 135d33505ae2d529c09aa1560de7fd0b21753ca5 SHA-256: d2a0cbd7599e6b3c80f5f54c843c47ec7dd4b956a7831290fd58fdfd21bd8a85
120 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, specifically pointing to 'https://ttraff.com/wix?keyword=excel+worksheet+contains+invalid+references'. This indicates a social engineering attempt to lure the user to a malicious site. The document body, though heavily obfuscated, contains text fragments suggesting it's disguised as an Excel worksheet. The presence of numerous embedded links, many pointing to Shopify, further supports the link farm heuristic, suggesting an attempt to obscure the malicious redirector.

Heuristics 3

  • 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.
  • 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=excel+worksheet+contains+invalid+references
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/pathfinder_kingmaker_paladin_build.pdf
    • https://cdn.shopify.com/s/files/1/0448/0565/2637/files/ace_academy_books_mechanical.pdf
    • https://cdn.shopify.com/s/files/1/0454/3060/3932/files/605494805.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6069/files/71455960013.pdf
    • https://cdn.shopify.com/s/files/1/0432/1578/2048/files/proses_metabolisme_lemak.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/adagio_albinoni_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0444/2639/5814/files/jogananoritomufore.pdf
    • https://cdn.shopify.com/s/files/1/0435/6161/5519/files/degesamuk.pdf
    • https://static.usrfiles.com/ugd/b8c837_3daa7cc62bae48708f7609399e071a1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_439cb3377941494f903a4dad124ae329.pdf
    • https://static.usrfiles.com/ugd/0dd040_3261945399824043812bb3809a7a77de.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_off00005d45.bin
8ea49ba6d335e0bdf0a987c4f305e46d54f0fb530e08e2d1f178eeae42314d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 5140 bytes
font_01_sfnt_off00006ec4.bin
97f2a7834c59876a724275bd973e31c787c24a1fbb72a61e74ffc4c2ab4df7d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC4 10456 bytes
font_02_sfnt_off0000927e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x927E 4324 bytes

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