Malicious PDF — malware analysis report

Static analysis result for SHA-256 3894bfbe95c1a80c…

MALICIOUS

PDF

35.4 KB Created: 2020-08-30 21:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bc92801cffa36ac834e77a00f3029a8 SHA-1: 99121b46099635061a6811c61a475c3c2d16b3ae SHA-256: 3894bfbe95c1a80c51a0b89a7928c0129adfe280e120467f9c9f6c816bfaab52
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure. The document body itself is heavily obfuscated and appears to contain metadata related to its generation rather than user-facing content.

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=manual+de+montacargas+clark+pdf
    • https://cdn.shopify.com/s/files/1/0439/2786/3464/files/hemp_bracelet_instruction.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/49739306793.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/vubetefa.pdf
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/aranjuez_mon_amour_sheet_music.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aecc89c16794de0bd20c4facf33b5aa.pdf
    • https://static.usrfiles.com/ugd/b80405_d0341f64497f429683850ffaba321bfe.pdf
    • https://static.usrfiles.com/ugd/9b5f63_0cb7b48c8027421ea63f4193ef9f387b.pdf
    • https://static.usrfiles.com/ugd/cf79db_a62faeb3f5c149ad8b508c54b348234f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed426657fc0c469bba22da7019b26597.pdf
    • https://static.usrfiles.com/ugd/b8c837_c006eff4af144b62b554a8e6e65f7e1c.pdf
    • https://static.usrfiles.com/ugd/81d6a4_bc073d7dbc9d4cf2ad94e4650a71893f.pdf
    • https://static.usrfiles.com/ugd/fac845_4129951880904cde922626f8d9f027d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_c156cb0b3be843ce97a3e570bb728c2c.pdf
    • https://static.usrfiles.com/ugd/286fb8_b4658d1dc92644adb595908f02dc4f68.pdf
    • https://static.usrfiles.com/ugd/b8c837_0792b88f3e704728b07e4b0b60683034.pdf
    • https://static.usrfiles.com/ugd/36f25b_4b2c40b324dd4bce9661a6c3341ba44d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c007166d0c1f478d9e6c4c4778f2723f.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_off00004b75.bin
fe37adf1c919ecc0e8ec2b4cb7127b024b7e04a4755add0f8902518572d3ced3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B75 5544 bytes
font_01_sfnt_off00005e3f.bin
df59590add7c2d47c81b32d8f495d936b9fa0115ebecc35841c846fe3cdf265c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 10028 bytes

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