Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e4391e332ca52d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 13:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 618e375ed3e7ef9eae868b50234dd828 SHA-1: 440c652d12bb036e370720dda9c8948d5c0286a2 SHA-256: b8e4391e332ca52d064e955539f9bc6eb92c43c13f686910e56171a1a913ee47
140 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lead the user to a harmful site. The document body, though partially corrupted, suggests a lure related to a 'product installation guide template'. The presence of a callback lure heuristic further supports a phishing or scam pretext. The primary malicious IOC is the redirector URL which is likely used to host further stages of the attack.

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.
  • 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.cc/wix?keyword=product+installation+guide+template
    • https://cdn.shopify.com/s/files/1/0430/8716/7637/files/42853044632.pdf
    • https://cdn.shopify.com/s/files/1/0436/1070/1981/files/mercury_outboard_15_hp_2_stroke_manual.pdf
    • https://cdn.shopify.com/s/files/1/0462/8722/4993/files/bts_guideline_bronchiectasis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4506f7c46214facacc6fc0c8b826402.pdf
    • https://static.usrfiles.com/ugd/738632_bb83ae2bd5a649f790eeda9f4cfaae12.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_cc939a5669aa4fc8989d36864f2d4e23.pdf
    • https://static.usrfiles.com/ugd/565485_33fdd268f6e9466ba506f7bf7a01d990.pdf
    • https://static.usrfiles.com/ugd/21e6f2_a612154841a94628a4e5afb2de462dcd.pdf
    • https://static.usrfiles.com/ugd/05900a_00945cc2d6934775bae91c06f81e3d17.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/audit_of_current_liabilities.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/kadezowijegutonuturasag.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_off00006114.bin
b14c69ae7cce96596561420cd3310238b1eefac9f03f53798e4687def1464791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 5392 bytes
font_01_sfnt_off00007354.bin
a98d8360b86de582f6893c706c29f5c0cefeb1c91941c8b4f59d86097a64b2e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 10832 bytes

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