Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a7489acc68ced9…

MALICIOUS

PDF

59.9 KB Created: 2020-08-08 14:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f54b68f5155fe648834c3f40622751e SHA-1: 8310aceda3b97325b5160a6a89e894c15e38f9e4 SHA-256: a6a7489acc68ced985da81d46a449946296487ebfe5d57f7f261050ad7d3a2dc
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. 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 ultimate destination. The file was authored by wkhtmltopdf, a common tool for generating PDFs from web content, which can be abused for malicious purposes.

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/pify?keyword=business+strategy+pdf+journal
    • http://files.genevieve-simon.com/uploads/1/3/1/1/131164425/forajiruzujox.pdf
    • http://files.ksasteel.com/uploads/1/3/0/7/130739525/wuruvinu.pdf
    • http://files.gordonjames.net/uploads/1/3/0/7/130739993/tawajizoguda_dixogurozela_dipebefiromu_xorobe.pdf
    • http://files.styer-fitzgerald.net/uploads/1/3/1/1/131164364/922863.pdf
    • http://files.mtolivetofperry.org/uploads/1/3/1/8/131871621/4f8f684f94.pdf
    • http://files.ksasteel.co
    • https://cdn.shopify.com/s/files/1/0432/3416/4893/files/nogakufaxen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/fukunita.pdf
    • https://cdn.shopify.com/s/files/1/0438/7527/0811/files/nespresso_inissia_descaling_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/coffea_canephora_robusta.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/vadajetagogot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/download_ahange_jadid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/danokewujexuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/4768/8091/files/chemistry_notes_for_ssc_cgl_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/anorectal_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/psp_custom_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/pierre_bourdieu_outline_of_a_theory_of_practice.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/lotarujiposevewekem.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_off00009ec9.bin
6f878cbabb5e6b6bc64b064fb550af09ce7d00377e8e388310a1b9c3b2425dbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC9 5316 bytes
font_01_sfnt_off0000b0f4.bin
02cf80a20580ed713efc241b4a0881b1f43e0a3acd7b88452307b1f3c7fbde70
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F4 10312 bytes
font_02_sfnt_off0000d424.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD424 4324 bytes