Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9dad5d0f0941080…

MALICIOUS

PDF

66.4 KB Created: 2020-08-31 12:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8360e66ad01ec717f3a133d2f572c327 SHA-1: 9e201e07456d01eb29dbd081f4523fa6e97221c6 SHA-256: b9dad5d0f09410806e0c893ef680af2be9105fd40efb307787e54e7386d14a48
128 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 a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, some of which are benign but others lead to potentially malicious infrastructure. The presence of a 'download button' lure further supports a social engineering attack pattern. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=self+esteem+worksheets+and+activities
    • https://static.usrfiles.com/ugd/e5412a_401dff06a7ce4fd791ac2e5f10b1a0bb.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_93be307d20974553a147807575f8f3fe.pdf
    • https://static.usrfiles.com/ugd/3aee12_5c7b8652c9f24b4c9daf27ecf02bf590.pdf
    • https://static.usrfiles.com/ugd/3d0627_65d5998064f84a36912a5db09093d2e2.pdf
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/1573877009.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/video_er_for_mac_firefox.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/96988482183.pdf
    • https://cdn.shopify.com/s/files/1/0433/8948/5221/files/evaluation_formative_module_6_aide_s.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/25061582372.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/osrs_dks_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/6172/1765/files/rixawupajaliziwuba.pdf
    • https://cdn.shopify.com/s/files/1/0457/5635/0628/files/90652221969.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/waxomex.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_off0000b91f.bin
8a6f715b1db9379a65db43c6065293885bcd455fc5dda8466a160400b9f6ff58
pdf-font-stream PDF embedded font (sfnt) at offset 0xB91F 5368 bytes
font_01_sfnt_off0000cb48.bin
8904c3fa06df9691a3f58d0cf3a0d27786644fcf0fef8fa12a7a932b9c1a9dea
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB48 10316 bytes
font_02_sfnt_off0000ee82.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 4324 bytes