Malicious PDF — malware analysis report

Static analysis result for SHA-256 5771aa96ea21d366…

MALICIOUS

PDF

41.9 KB Created: 2020-08-05 10:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7554b311f6786735dc28c5d71e539ff4 SHA-1: ef859efb4345d97d0ee4b803938c8e6cfa15ee3d SHA-256: 5771aa96ea21d36619b7250c4020917ede6bae59779ff5790d093ee360681651
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'fastest pdf reader android free' download. The document body, though heavily obfuscated, contains fragments that suggest this lure. The PDF also contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning or to host malicious content. The primary malicious IOC is the ttraff.com redirector.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=fastest+pdf+reader+android+free
    • http://files.luzthecakelady.com/uploads/1/3/1/6/131637850/fc1baa.pdf
    • http://files.makewavesswimschool.com/uploads/1/3/1/4/131483002/942080e7d3cf6f.pdf
    • http://files.david-reinhard.com/uploads/1/3/1/4/131438639/vavorawesixeku.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/sarupisuwalewokakifado.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/wulalik.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/69217591503.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/3739273051.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/91123658361.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/35062338101.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/newar.pdf
    • https://cdn.shopify.com/s/files/1/0438/4446/8901/files/16671228644.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/sukulexekufif.pdf
    • https://cdn.shopify.com/s/files/1/0438/2287/4781/files/canasta_basica_en_el_salvador.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/26781847814.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/36991631425.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_off00006777.bin
3f2c597579c007db2fae0de14d5af63cfecbf2ea6114d996bc320022d11f8490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6777 4960 bytes
font_01_sfnt_off00007868.bin
59011fa7a9b81a1487fb6dfdb328457b323c1c9a142ee2fa1a743a3d54c22b8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7868 10044 bytes

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