Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d06dbaaccf2ef0…

MALICIOUS

PDF

36.6 KB Created: 2020-08-23 12:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 156c085d3f7e97982c484da77a2dadfe SHA-1: 8a51901b0b0206a4d53ae2b2b86c47502a9de304 SHA-256: 91d06dbaaccf2ef08a90eeb7073b703cb29498d204292c2f38ce829c54503612
180 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a large number of external links, suggesting a link farm. The document body and heuristics point towards a payment redirection or callback phishing lure, aiming to trick users into fraudulent transactions or providing sensitive information. The primary malicious IOC is the redirector URL: https://ttraff.com/pify?keyword=chapter+35+benefits+direct+deposit+form.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=chapter+35+benefits+direct+deposit+form
    • http://files.tampasystema.com/uploads/1/3/2/6/132695418/6b4ece88.pdf
    • http://files.besedin.org/uploads/1/3/1/4/131437276/6071c2ec86.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/5579793948.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8800/files/japixufodusevinepu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/bigo_live_app_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/73324588346.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/32102083324.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/53968686070.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58580374151.pdf
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/47034606449.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/numeros_romanos_del_1_al_200.pdf
    • https://cdn.shopify.com/s/files/1/0439/6207/3246/files/pidezasore.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_off000050c3.bin
e4694c8d58cb7f3ff0c03e16f2cedea993458bc845d929bbe2b288dc9214532b
pdf-font-stream PDF embedded font (sfnt) at offset 0x50C3 5696 bytes
font_01_sfnt_off000063eb.bin
cdb6f4d65759d72ffc47cb921163bc945f46d69b29721d094dca7cb052fbbdc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 9840 bytes