Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f5498587a52842…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 14:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddf87041809b8b77d7110a5a4d045abc SHA-1: 4c56ab64e76097158751bfe4ca929ceaf9132313 SHA-256: 31f5498587a528422453203d705ae3bea7afcbdc28f5e3bd44c95bb0c2bc393b
160 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a redirector link to a known malicious domain and a high-severity finding of a payment redirection lure. The document body, though heavily obfuscated, contains text related to 'sbi cheque book letter format' and embedded URLs, suggesting a phishing attempt. The primary malicious URL identified is https://ttraff.com/pify?keyword=sbi+cheque+book+letter+format, which is likely used to redirect the user to a phishing site.

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=sbi+cheque+book+letter+format
    • http://files.speakingintears.com/uploads/1/3/2/3/132302810/3860553.pdf
    • http://wunilis.pchschoirs.com/uploads/1/3/1/1/131164250/nosijezididur_dafofeb_tizogi_gixesutepudado.pdf
    • http://davituwu.meganmmoore.com/uploads/1/3/0/7/130738973/jufemeresigifodakug.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/37248708708.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/33390293133.pdf
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/tahoe_pontoon_boats.pdf
    • https://cdn.shopify.com/s/files/1/0432/7732/0348/files/6640889777.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/good_books_to_read_during_pregnancy_for_baby.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/89820088345.pdf
    • https://cdn.shopify.com/s/files/1/0440/6919/1832/files/83054958578.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/petabok.pdf
    • https://cdn.shopify.com/s/files/1/0448/4166/4669/files/vyond_character_creator.pdf
    • https://cdn.shopify.com/s/files/1/0431/2131/1898/files/27554014642.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/96263753242.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_off000066b1.bin
2322c6038b06580d9eb1746a84b196c3b4882c1fbe1f3ce797a6312e6313886f
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 5152 bytes
font_01_sfnt_off00007839.bin
8f1c8f9d6196a7184fa23950d0e49dae3304f097180fc4f970f3b9844ed80df3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7839 9940 bytes
font_02_sfnt_off000099f7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x99F7 4324 bytes