Malicious PDF — malware analysis report

Static analysis result for SHA-256 b846081e340ba488…

MALICIOUS

PDF

43.8 KB Created: 2020-09-09 18:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79d2191a292cffd7b82f0f211b3f3b69 SHA-1: e1353b98884c1629e64667e2c8e24110aaa21698 SHA-256: b846081e340ba48886e905bb583dc49ab31e9690eac45443b38348622916e11f
140 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains this URL and also references 'ammonium chloride msds sheet', suggesting a lure. The file also contains a PDF SEO link farm heuristic, indicating it's part of a larger network of linked documents. The presence of a callback lure heuristic suggests a potential for social engineering to elicit a phone call.

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.club/wix?keyword=ammonium+chloride+msds+sheet
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/administrative_coordinator_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/80873994958.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7319/files/98461767910.pdf
    • https://static.usrfiles.com/ugd/8e1900_98bf154006264afc9a09748e90315d5e.pdf
    • https://static.usrfiles.com/ugd/fb5067_b9324dd95b934cc2910141a357e1b814.pdf
    • https://static.usrfiles.com/ugd/bc84a3_4b966e1cb3a34eed9b78a2983e91bf98.pdf
    • https://static.usrfiles.com/ugd/eb4c03_c79a9c59a334471c85497998059187dc.pdf
    • https://cdn.shopify.com/s/files/1/0430/7619/0361/files/kusam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/hackerrank_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/zanun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/cch_bn_cu_th_trong_fifa_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/porozusuvavasiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/88833941109.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/renewable_and_nonrenewable_resources_worksheets_elementary.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_off00006fa8.bin
c60a228794dfbbdfca89f8e300a21b49263f775e926616d939fced9e116164bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA8 4956 bytes
font_01_sfnt_off00008055.bin
be15dcc98fdf4c298840fca56a6331e27b611bfcac56c1b896068ac60465fb0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8055 9976 bytes