Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf9a41df4d07229…

MALICIOUS

PDF

123.3 KB Created: 2020-08-31 13:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43b672e7d904eb8b24e5f96df81a873c SHA-1: 891d9ea26b29c2f2ea4958128c5c8917133534dd SHA-256: bdf9a41df4d072299432878043ee5e59d66c90301352a967f8b68d84f0078b80
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=capacitor+equations+pdf'. This URL is presented within the document body, disguised as a link to 'capacitor equations pdf'. The file also exhibits characteristics of a link farm, with numerous external PDF links. No scripts were extracted, and the document body content is heavily obfuscated, but the primary intent appears to be directing the user to a malicious site.

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/pify?keyword=capacitor+equations+pdf
    • https://static.usrfiles.com/ugd/b8c837_52551db70c754f599b83e9b3a7d13f27.pdf
    • https://static.usrfiles.com/ugd/7c30af_fbb2768285aa4f3eb3ed738771a5a85e.pdf
    • https://static.usrfiles.com/ugd/b11f6d_e033ccc1aa904e36b20f6862115124f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_57da1a70ffb54bcdb5b94610ada5d0ce.pdf
    • https://static.usrfiles.com/ugd/f8de3e_33199367a82046229374fa54cb22de4c.pdf
    • https://static.usrfiles.com/ugd/77941b_8dd0c1aa359d467c98c3da5a86b72e85.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5c203be6fd04277a123e4f82d50e7ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_70bdf55477a54863a2aab8f1195cbc7b.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/72502350716.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/snell_y_bohlander_administracion_de_recursos_humanos.pdf
    • https://static.usrfiles.com/ugd/47b1e8_6abb2593158e47adb678755a62f0ce90.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89b70d13faa442ebdba2253dfcfa388.pdf
    • https://static.usrfiles.com/ugd/d5cf39_b63522c105824755b70606c2c0df1ce5.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_off00018723.bin
7efaaf15d6b56028db3a9f3ec852fa45e9631e16d1164204bccc432e58cd60a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18723 5148 bytes
font_01_sfnt_off000198ae.bin
be19cd589d15d0c6e8f8cef97522aa5aff34181d830581802d9be34d083adf65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x198AE 14520 bytes
font_02_sfnt_off0001c794.bin
5f1d807619b4e0e8b506022e5ef4c5525257e1b8d64f46eafcfe4987dbaf4a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C794 16708 bytes

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