Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc76b0d688bdf262…

MALICIOUS

PDF

61.9 KB Created: 2020-08-30 23:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06f6fa0e1afb018f8dc5cc916d88ea91 SHA-1: e73179f78554ffec523f4d0b6a1cacad7ff239f9 SHA-256: cc76b0d688bdf262a75dc63ed0707a0915f52c5f460a66ed4c53f8515700b5c5
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains this URL and appears to be a lure for a specific search query. The PDF also contains a large number of links to other PDFs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the primary attack vector is the malicious redirector link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/wix?keyword=nirankari+avtar+vani+in+hindi+pdf
    • https://static.usrfiles.com/ugd/1813b3_85a582b0fef841e2b3c8c650cbd02610.pdf
    • https://static.usrfiles.com/ugd/1f2646_be68a953a0b24fc485ed1382e737da06.pdf
    • https://static.usrfiles.com/ugd/b8c837_754389c3fe49474483e0c5960eceea09.pdf
    • https://static.usrfiles.com/ugd/f46427_3e194f1676da41b2ad76d2059359310d.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0449/9534/6590/files/direito_penal_parte_geral_cezar_bitencourt.pdf
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/bootstrap_table_styles.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/42464840289.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_0471f702132d4c87aad83371ffabe7e4.pdf
    • https://static.usrfiles.com/ugd/756799_d1640bdff557438fb327875f881666b9.pdf
    • https://static.usrfiles.com/ugd/0c4177_720f000fbf954e5eab8839de0c745111.pdf
    • https://static.usrfiles.com/ugd/e42ee3_2b18b4b01c71479c85b54808993bc0b7.pdf
    • https://static.usrfiles.com/ugd/efb3f0_1478198762e34b8c8eb8b8f72009256b.pdf
    • https://static.usrfiles.com/ugd/b8c837_65061ddcc2a14518bc7b47bbc370ada7.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000849b.bin
b56eb6410c46eb48cbae4afadf0e63313568fa855e37e0f8e9a9d8c6fc8bdc5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x849B 5012 bytes
font_01_sfnt_off000095a5.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
pdf-font-stream PDF embedded font (sfnt) at offset 0x95A5 3720 bytes
font_02_sfnt_off0000a108.bin
0471e984814890df3aba353de2f3a3b90ace6aad635668d98facb58d25227265
pdf-font-stream PDF embedded font (sfnt) at offset 0xA108 15888 bytes
font_03_sfnt_off0000d18d.bin
a703512ca6c77aa583e55bf99df73a29dc1623df89b201331caec30a753cde26
pdf-font-stream PDF embedded font (sfnt) at offset 0xD18D 7116 bytes