Malicious PDF — malware analysis report

Static analysis result for SHA-256 499d91c7244d0d06…

MALICIOUS

PDF

50.6 KB Created: 2020-08-28 12:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25b6662dfeab3c8febf196175ab4e972 SHA-1: 5451c2b3af21338430139858594de0b0bfee6f88 SHA-256: 499d91c7244d0d0622c2aa38b09138d57fbe8e94664b0bc2cbfd55eafe34bf82
170 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and part of a link farm, specifically using an invoice lure. The primary malicious URL, https://ttraff.com/pify?keyword=invoice+example+with+vat, is directly embedded and likely serves as the initial point of compromise. The document body, though heavily obfuscated, contains references to this URL and other benign-looking Shopify links, which are likely used to mask the malicious activity. The presence of multiple unknown URLs further suggests a campaign distributing malicious content.

Heuristics 5

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=invoice+example+with+vat
    • http://bumumupag.savemartlascruces.com/uploads/1/3/1/8/131871721/2741918.pdf
    • http://sotuvavu.tinmanministries.com/uploads/1/3/1/3/131383791/6658085.pdf
    • http://files.winchestercarpetoutlet.com/uploads/1/3/1/4/131452858/kezoka-xebafigad-lolonufiwuje-vawikada.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/wofapok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/50790408948.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/tokakomuf.pdf
    • https://cdn.shopify.com/s/files/1/0449/1545/8215/files/luwimefenodubotago.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/31647852668.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/zedajonurekere.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0434/8297/2326/files/64582188161.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/88234961247.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8988/files/games_for_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/kalakuj.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_off00007bb9.bin
d12e72240db04582ccbdde6da3da477a777173c4843798962467caca0fb04f59
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB9 4844 bytes
font_01_sfnt_off00008c0f.bin
1513d3e4d1b4490364726584cb4e30a561b2ca15aa4618fdfb32562028d3fdc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0F 10400 bytes
font_02_sfnt_off0000af65.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF65 4324 bytes