Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9a12b35715fdc1…

MALICIOUS

PDF

41.8 KB Created: 2020-07-31 22:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd686d3ea81bdf8c75243bef5e3f7c9 SHA-1: 48ef13dd8248dc04e809cec6dd00d7fc42bd8923 SHA-256: ef9a12b35715fdc11c345dfe439dc8fa79fbd44eeab2cf1f03e61bf7d499721c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector service (ttraff.cc). Another critical heuristic identified this as a PDF link farm, with many links pointing to Shopify-hosted PDFs. The document body contains the URL 'https://ttraff.cc/pify?keyword=bamboo+cth-+670', which is likely used to redirect the user to a malicious site. The presence of numerous links suggests an attempt to distribute malicious content or phishing lures.

Heuristics 3

  • 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.
  • 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=bamboo+cth-+670
    • http://files.abmodelmaking.com/uploads/1/3/0/8/130874010/9901382.pdf
    • http://files.isawyournutsmommy.com/uploads/1/3/1/3/131383549/49293f2.pdf
    • http://files.michigantales.com/uploads/1/3/0/7/130739343/1851483.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/93838835705.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/62936786196.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/zurusibibibemozekodemad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gimuwuwizarisatin.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/24214459457.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/berasuponodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6160/files/tobowuvejugisujunowuguwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/kujifupezegirurunirike.pdf
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/menojulodusow.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/642356355.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/90809137667.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/konomuzipeberug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/36158279350.pdf
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/49328253076.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005054.bin
8c28d92996b520e308d6e1d5f7310cb360f526f06d5630b09325747b012abf38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5054 4848 bytes
font_01_sfnt_off000060d2.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D2 1800 bytes
font_02_sfnt_off00006960.bin
0bea90f9560108ebc217428ee25b4539436fdeb5c99c092c18ec9082f2348347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6960 10152 bytes
font_03_sfnt_off00008c11.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C11 4324 bytes

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