Malicious PDF — malware analysis report

Static analysis result for SHA-256 506fef9d6ddadf8f…

MALICIOUS

PDF

51.6 KB Created: 2020-08-30 23:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d631fd54f4ba52d4e5f640eee0401ad SHA-1: d3f0a26aa80aede567f2925cebb6e4ab8f4824f8 SHA-256: 506fef9d6ddadf8fa34cac647495e331448934bd5949d835f1abe53521c53a04
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/wix?keyword=yupoo+sunglasses+cartier'. This URL is presented within the document body, suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=yupoo+sunglasses+cartier
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/art_of_argumentation.pdf
    • https://cdn.shopify.com/s/files/1/0437/5943/5928/files/53009012537.pdf
    • https://cdn.shopify.com/s/files/1/0430/9352/4637/files/19343746513.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/esempio_abstract_tesi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4668/1248/files/bolide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7057/files/pudubozesidomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5324/files/nubapetizoxilujorupid.pdf
    • https://static.usrfiles.com/ugd/b8c837_e824070f6e1745b1bfb4cc3cb22c099a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a27ceee5ee714d4b8ebded0024d36048.pdf
    • https://static.usrfiles.com/ugd/b85eb0_34a2a1db257542a08a9852b715614e29.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_2b4c6750d18c4cdc9af5e9ca60b53cc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b6e3b6021034155861f02ebd27a7b7e.pdf
    • https://cdn.shopify.com/s/files/1/0463/1619/1904/files/palakelogaxuzavedaziva.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/36031917990.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/70502419817.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/86190777769.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/ubuntu_system_program_problem_detected.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
stream_005_off0000a1b0.bin
12170bff677da671b4380734c7dce0a4c903c0c714150038fb92452e9e1568f5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA1B0 18756 bytes
font_00_sfnt_off00006195.bin
6e1e9f072cc9b8e8f30e6a9c18368445f6879106eead3cc2f068442ec732475e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6195 5060 bytes
font_01_sfnt_off000072dc.bin
b436aa6b1e884c4fa4b75a5abbeab89e92f80942db52d277eb6b41f27acc9b6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x72DC 15392 bytes