Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ad44843592ea91…

MALICIOUS

PDF

43.2 KB Created: 2020-08-01 22:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a85ab7a6edba86a7d47e831cfd1c2d64 SHA-1: 04b45397a0c7d75866c9357cc7b02c2701cc7bb2 SHA-256: f5ad44843592ea912f160da0413d5f2404de2ee0a90a7b5a088f34f2aebf53d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure related to changing Windows 10 user account details, which is a common tactic for phishing or credential harvesting. It embeds multiple links, including one to a known malicious redirector at 'ttraff.com', and a large number of links to PDFs hosted on Shopify. The heuristic 'SE_PAYMENT_REDIRECT_LURE' further supports the phishing pretext. 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=windows+10+change+user+name
    • http://files.davidmichaeldesign.com/uploads/1/3/1/6/131636766/3ab714.pdf
    • http://files.smileschildrensclubs.com/uploads/1/3/2/3/132303269/9493299.pdf
    • http://files.brandow-law.com/uploads/1/3/0/9/130969944/0d327e8792b.pdf
    • http://files.writercassmichaels.com/uploads/1/3/2/6/132681295/5c425baa9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/polonafebomi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/1746561988.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/66002450844.pdf
    • https://cdn.shopify.com/s/files/1/0430/0315/0499/files/74524980263.pdf
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/97489006726.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/47900700083.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/skyrim_better_faces_mod.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/48650337558.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/zemukisopamaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36283751979.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_off00006ac9.bin
33a9009b93fba37f310582bf7523b8f18d127987d880f9c6afca7bbdf229568f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 5620 bytes
font_01_sfnt_off00007ddb.bin
187b0d917307df65ef4d8cf33f6fbdd7deddc7ee214a0900010fa5c19c1a51da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDB 9936 bytes

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