Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc2c315d1fa4047…

MALICIOUS

PDF

42.3 KB Created: 2020-08-03 03:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a385ad6e3ed68203eb35192b7013a9d9 SHA-1: 5935896cc9a6dde3ad681be2a9f8790593ea3090 SHA-256: 3cc2c315d1fa40479ece527680b69fa11dca5d0cfe7a481f1074b462e591209a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=convert+vmdk+to+vhdx`. Additionally, the document body contains text that appears to be a lure for file conversion, and a heuristic indicates a command execution lure, suggesting the user is instructed to interact with the system's command line. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=convert+vmdk+to+vhdx
    • http://files.intuitiveaim.com/uploads/1/3/0/8/130814353/8e6581ec20a91.pdf
    • http://files.monfortestatesdacula.com/uploads/1/3/0/7/130738636/2f308c4021add0.pdf
    • http://files.kristajordan.com/uploads/1/3/2/6/132681976/5c66d59b28.pdf
    • http://files.khuloudkonsultancy.com/uploads/1/3/0/7/130775712/c7b2f501358a.pdf
    • http://files.montananazarene.org/uploads/1/3/0/9/130968950/rafofezodakibosi.pdf
    • http://files.khuloudkonsultancy
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/apple_mobile_device_service.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/70346444346.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/kupuvavuwopo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/1869369806.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/88601641103.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/gawitale.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/50177428354.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/xixeginewadivomawavimeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/towonomanijalesirinedune.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_off00006792.bin
f93b3c08b2c9567a0bdad10ecbef101c806bd1f8ab187b42175c6bf713e0d3d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6792 4744 bytes
font_01_sfnt_off0000778a.bin
7ec2275c6a1d7d1a64688bfc14c43dcc8bac5fa0e3609e0a4a3ea7fee81cb403
pdf-font-stream PDF embedded font (sfnt) at offset 0x778A 10748 bytes