Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fe1da1141b2009…

MALICIOUS

PDF

41.9 KB Created: 2020-08-01 04:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8be399afaa04f8ecad7e3890e02b33b4 SHA-1: ddff44bc90354a0377807f5c71b179e51c8cc8d9 SHA-256: 88fe1da1141b2009b233197b0f345d6edfb932c97ec58917f6df13cf33aae405
180 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=python+ssh+server'. Another heuristic indicates the document is designed as a 'secret recovery lure', requesting sensitive information from the user. The embedded document body, though heavily obfuscated, contains the malicious redirector URL, suggesting the document's primary purpose is to drive traffic to this malicious site.

Heuristics 4

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.com/pify?keyword=python+ssh+server
    • http://files.nashvillephotographyclub.com/uploads/1/3/0/9/130969169/sunuvisubido.pdf
    • http://files.bobwaltervoiceworks.com/uploads/1/3/1/3/131384281/vesuwenikevixi.pdf
    • http://files.rrighart.com/uploads/1/3/0/8/130813524/e29a6e.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/961900536.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/fitakexifof.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/zudasepidedix.pdf
    • https://cdn.shopify.com/s/files/1/0438/2546/3456/files/vunofokufi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8714/9733/files/rakivirowigavodadu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2406/3392/files/3235588401.pdf
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/simplex_2350_master_clock_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9557/files/76801511637.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/75758651088.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/teved.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/bajujufejo.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_off00005d24.bin
30ad6d6272aad78a540acb729f7fe1e23b9aa209fc025fcaec38c275ff5227cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D24 4436 bytes
font_01_sfnt_off00006c23.bin
9a7f0934a792e395a99d09c012c52c9e92b59957cb5cd6fce11f3c24706ce8a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 9732 bytes
font_02_sfnt_off00008d48.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 4324 bytes