Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98b8fdb57f5053e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-21 05:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 299166718cbdf9a50f8ae1470056f7fd SHA-1: 53a273f9fd2059e46f6457fc4e2010c88d1768ec SHA-256: a98b8fdb57f5053e98c93c51ce0f656176e0c7d3ae8e91fcc7169f60e13a9f0f
242 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body and heuristics indicate lures related to payment redirection and MFA harvesting, suggesting a business compromise or phishing attack. The presence of a visible LOLBin command execution instruction, though not fully detailed, further supports malicious intent. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download.

Heuristics 6

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.cc/pify?keyword=auto+id+card+format
    • http://files.makeupbysarahe.com/uploads/1/3/0/7/130775013/3358622.pdf
    • http://tegovasir.pwshchoir.com/uploads/1/3/1/6/131606140/pomonaseluduni.pdf
    • https://cdn.shopify.com/s/files/1/0449/4698/1023/files/dubibovib.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/biwopolituga.pdf
    • https://cdn.shopify.com/s/files/1/0429/7739/4847/files/gojezizureworimojuzetejop.pdf
    • https://cdn.shopify.com/s/files/1/0437/4708/2389/files/nevusafixados.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/laboratory_technician_cv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/botezikapunasoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/29032713102.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/15503571592.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6117/files/tubukitivepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/bukejiduribuveli.pdf
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/burger_king_coupons_juli_2020.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_off0000651f.bin
0a40c0c874401ae1dc6c3a0aca54f34aaed009615dbdf62dc24243907ba3bf3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x651F 4948 bytes
font_01_sfnt_off000075d9.bin
1f221cbc6c7723fe5012cbc820349ac1ef164c6f6ee0c9bd9ec3976e5577abe0
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D9 9996 bytes