Malicious PDF — malware analysis report

Static analysis result for SHA-256 accc7b1851dce7a2…

MALICIOUS

PDF

47.9 KB Created: 2020-08-01 20:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fce9b4cce1a2fafbb75feb5b593d368b SHA-1: 1917af74c46d525ee6cf53aa759fb417b54cc33d SHA-256: accc7b1851dce7a291fe5a35f3d06d5eb73e58b87a775ad13411420c9bd252f2
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a reference to 'curl http post' and a URL that aligns with the redirector. The presence of a link farm further suggests an attempt to distribute malicious content or phishing lures.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=curl+http+post
    • http://files.holes4hope.com/uploads/1/3/1/3/131398123/tivebitedobukomurut.pdf
    • http://files.wjamesd.com/uploads/1/3/2/8/132816066/12906e98.pdf
    • http://files.brushandbranch.co/uploads/1/3/0/7/130740344/2297158.pdf
    • http://files.pawsacupuncture.com/uploads/1/3/2/6/132696104/nekola_gefewukulipez.pdf
    • https://cdn.shopify.com/s/files/1/0434/4663/2615/files/danganronpa_never_say_never_fanfiction.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/17728968936.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/25685005117.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/15389286485.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/zetuxunakatubifapada.pdf
    • https://cdn.shopify.com/s/files/1/0435/7865/4883/files/jurexepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/noripuxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/norumugukuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/gojazezofujarejamimub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mowajuvide.pdf
    • https://cdn.shopify.com/s/files/1/0437/9204/0097/files/noxokudubabomiwajosowexi.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_off0000696d.bin
960bbd92246c70fbfa7f8c5f8d08fcef369fac5000d1b506a8744d58c2d1f499
pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 4604 bytes
font_01_sfnt_off00007907.bin
c6fcdaab97a8353972748f03dcb02c7f622b1e6cc776a303f6a351cf8bdac930
pdf-font-stream PDF embedded font (sfnt) at offset 0x7907 10472 bytes
font_02_sfnt_off00009d05.bin
4c01831bdfffbafff55fd55c88415eb2201da44b622d6ec769a15ea8bc50db3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D05 16352 bytes