Malicious PDF — malware analysis report

Static analysis result for SHA-256 90257a8e7e395206…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 01:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a58fbf104ac1cb9bb071868b7946b35d SHA-1: 38cb07bcccffa848e5c1390133f3ca4d52e3dea5 SHA-256: 90257a8e7e395206d30f6be04dd0f03e2c8bdcb40484a391a6d6f9b1543dad19
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body text and a critical heuristic indicate a callback phishing lure, specifically mentioning 'cancel avast cleanup'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cancel+avast+cleanup, which is likely used to redirect the user to a malicious site. The presence of numerous PDF links, many hosted on Shopify, suggests a link farm or distribution mechanism.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.cc/pify?keyword=cancel+avast+cleanup
    • http://files.feilonglight.com/uploads/1/3/2/6/132696117/goronijiwi.pdf
    • http://files.wheelhousetheater.org/uploads/1/3/0/7/130739906/2386112.pdf
    • http://files.rwgroves.com/uploads/1/3/2/3/132302859/xuzugoj.pdf
    • http://files.actorheadshotphoto.com/uploads/1/3/2/6/132695325/bf296ccd5c.pdf
    • http://files.kristamasonyogafitness.com/uploads/1/3/1/6/131606289/7238120.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/numorudivigamiwefakum.pdf
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/swanson_speed_square_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0431/4156/2522/files/move_file_in_linux.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/51378717526.pdf
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/karcher_pressure_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/61318051594.pdf
    • https://cdn.shopify.com/s/files/1/0437/2096/6298/files/52333430839.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/ligipavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7404/3556/files/58936087871.pdf
    • https://cdn.shopify.com/s/files/1/0434/2693/9042/files/74041892985.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_off000061f2.bin
835d4a85894fbd6cf1561777cbf252f1d0b2f71aca0dfc2f4d7382fa80d7d239
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 4796 bytes
font_01_sfnt_off00007257.bin
ec9afb08fbb7b3dc008edc64a9250ad304dd33795aed7d30bbda478fbfb4e226
pdf-font-stream PDF embedded font (sfnt) at offset 0x7257 9996 bytes