Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09cb4e7231c02bc…

MALICIOUS

PDF

53.3 KB Created: 2020-08-29 03:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 066e6250c4ec70a6d34852371c48b3ec SHA-1: 49715b92a0803046a0ac94df77775d755ba88d3c SHA-256: f09cb4e7231c02bc1d34c2676d5c2f5ba1c99d8ef7eab653cb806bcc4f5c7456
160 Risk Score

Malware Insights

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

The PDF contains a heuristic match for advance-fee scam lures, indicating a fraudulent intent. It also includes a link to a known malicious redirector, ttraff.cc, which is likely used to direct users to a phishing or malware site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious purpose. The presence of numerous links to Shopify PDFs suggests a link farm technique to improve search engine ranking for malicious content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=infinite+hidden+markov+model+matlab
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/61251965609.pdf
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/27660984136.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/congestive_heart_failure_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/95181405694.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/list_of_bullet_hell_games.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/67425063940.pdf
    • https://static.usrfiles.com/ugd/b8c837_106e6909ea0846108d2dba3fb7322356.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1578dece73340fc9d5ec14cd4dca690.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4fca41c453b4f93bd41336a055fcee9.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/gravity_and_friction_worksheet_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/bo_staff_training.pdf
    • https://cdn.shopify.com/s/files/1/0432/9082/0774/files/vidmate_app_install_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/34091224618.pdf
    • https://cdn.shopify.com/s/files/1/0461/4992/7075/files/holley_carb_sizing_guide.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_off000091dd.bin
c315cf2544680cd2a5aa4841eee43fd297b9ba68d918f4ec075d4dc6004d6e0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 5172 bytes
font_01_sfnt_off0000a344.bin
64f278c9d5ccdcf6acf1baf2a1b3d7579afcbe408bd4e19c41008d7262c2acb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xA344 10696 bytes