Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef3b35ffb5cc022…

MALICIOUS

PDF

65.7 KB Created: 2020-08-14 14:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6dbdfc712423fa1ff790489591ccb48 SHA-1: 57d5c5fac7f8b411986ea763e8f8d62b14cf4665 SHA-256: eef3b35ffb5cc02237aeeb78d894c1dea4d5ffd794bc8356f7a4d4b6a047630b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=visual+evoked+potential+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to other PDFs hosted on domains like cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the redirector URL, suggesting the primary intent is to lure the user to click this link, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=visual+evoked+potential+report
    • http://files.woodcut-tools.com/uploads/1/3/1/4/131453453/a17489ae9.pdf
    • http://gelomoli.jonarcherdesigns.com/uploads/1/3/2/3/132303382/e44bc7411bc6.pdf
    • http://files.childrentoday.org/uploads/1/3/2/6/132681910/minixuzukafokibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/miregemis.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/akroasis_tab_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3303/files/437394310.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/59449581960.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/merupo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7374/files/movelesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/74884480002.pdf
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/33010165116.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/82623591995.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/pamaseruzuvareri.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/popuxavariwarolaso.pdf
    • https://cdn.shopify.com/s/files/1/0437/6018/9594/files/digokej.pdf
    • https://cdn.shopify.com/s/files/1/0439/0620/3803/files/canon_ip100_manual.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_off0000b7b8.bin
e88a731753f96d4474964ef01286ab406abb2ea0bb3ed92ec6564e9c33eeb673
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B8 4924 bytes
font_01_sfnt_off0000c881.bin
66f7d1b8912fe2f06084859cad2b06a2266081a37365015bc6cc1bfb921083af
pdf-font-stream PDF embedded font (sfnt) at offset 0xC881 10144 bytes
font_02_sfnt_off0000eb44.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 4324 bytes