Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9308b601ead1870…

MALICIOUS

PDF

71.2 KB Created: 2020-08-31 06:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 807877743ed8285bc60117ff75d92998 SHA-1: 4e050a4f152bc149b02f9ecd3702dce6a48e8c7d SHA-256: a9308b601ead1870abdec593bf635fbc7f566708afe14804a5cb0ac53605a2c2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=tigerheart%2527+s+shadow, which is also flagged as malicious. The presence of a PDF link farm suggests a tactic to artificially inflate search engine rankings or distribute malicious links.

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.cc/wix?keyword=tigerheart%2527+s+shadow
    • https://static.usrfiles.c
    • https://static.usrfiles.com/ugd/0d9a50_3422f66f6e6f47ae81b1fa1edcf09867.pdf
    • https://static.usrfiles.com/ugd/cf79db_a62faeb3f5c149ad8b508c54b348234f.pdf
    • https://static.usrfiles.com/ugd/d5cf39_66afe435011345b097351cb4e426eda2.pdf
    • https://static.usrfiles.com/ugd/e4a001_efc3dafacf5443dd8fe44c6630d6f46c.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/wiruruwoxuguwakexikotakox.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/basepepipoledanixaze.pdf
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/ford_tractors_history.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/5394670519.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/74797167982.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/67416586341.pdf
    • https://cdn.shopify.com/s/files/1/0438/0105/1293/files/definicion_de_analfabetismo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/9371657391.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4104/files/bapowaxupirotete.pdf
    • https://static.usrfiles.com/ugd/b8c837_771bd48058614aebab9436fb5aa7caeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ec1a1d830b44764a98a65e00688bf9c.pdf
    • https://static.usrfiles.com/ugd/5e8de6_a4544eafed0a41fa8c1d74542a2a7bb6.pdf
    • https://static.usrfiles.com/ugd/f63f29_56db866d4ea14eb298c56cb5f1411e6e.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_off0000cb24.bin
d1613fa28924ed313b4c67dddc5fd086ec8a301f080caca774e9d83bce503809
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB24 4528 bytes
font_01_sfnt_off0000daf3.bin
b986aaf6449116bd667cee218204803a7b7283feeee54253823e726251003031
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 5132 bytes
font_02_sfnt_off0000ec79.bin
8a2df7fdf30c117a13ee8af98f301b8ee5488b8497bf5c17c340879e15023525
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 10204 bytes