Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3388fad7d2f7952…

MALICIOUS

PDF

53.5 KB Created: 2020-08-03 13:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34d192a0fa3e15a292ebd62e74b6b33b SHA-1: 52d5516081e96767c6c4ad070c81de44a5feaa4b SHA-256: a3388fad7d2f7952b1eeaa7ff5b26568a1e42652eab7a5a09e439e05a2a237b7
140 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though malformed, contains text related to a proposal and a URL that is also present in the heuristics, suggesting the user is meant to click this link. The presence of multiple Shopify links, while benign, are likely used to mask the malicious redirector.

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.com/pify?keyword=contoh+proposal+akuntansi+perpajakan+pdf
    • http://files.cityofdanville.org/uploads/1/3/0/7/130775002/nugexazoweka_xuwuveraz_monewev.pdf
    • http://files.apg-ga.hk/uploads/1/3/1/4/131412858/2698761.pdf
    • http://files.localmaximum.org/uploads/1/3/1/3/131398076/mikowuwatogo_ramuzipulim_xapiki_sufol.pdf
    • http://files.jacobhughesphotography.com/uploads/1/3/2/6/132696018/kedoxak_ruzafaluzazu_jerud.pdf
    • http://files.jessicamaan.com/uploads/1/3/1/4/131438216/7734afa716.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/55593349166.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/75076242444.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/how_to_reset_a_nintendo_switch.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/bevozitegejutivazujeruxi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/zexogijapin.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/rupizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/jevezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8545/files/xusugeriloguxuxitodatan.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2824/files/78485238466.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/62892523252.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.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_off000078dc.bin
87d398642d585e962a16bd3c11f05be892e0bcb3e165abf7f2d61b93f6de45a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 5172 bytes
font_01_sfnt_off00008a68.bin
eab987cac0296c562775efdc020670f030aa05a7c0ed4222a2c9340ffebed0fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A68 16124 bytes
font_02_sfnt_off0000ba72.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA72 4324 bytes