Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d56151a0b2e9a7…

MALICIOUS

PDF

52.3 KB Created: 2020-09-17 02:38:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0e519d43c096046e84b9f3456e16f61 SHA-1: 5f71e253d6411a7910b5a56b0b582b83383d02bb SHA-256: 77d56151a0b2e9a7f08c79726c7fe9ab91bc6dc0d9ff5d38ff135a76ddfbe11e
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for delivering malicious payloads or phishing pages. The document body, though heavily obfuscated, contains the text 'Things fall apart test answers' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links further indicates a link farm designed to distribute 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.link/wix?keyword=things+fall+apart+test+answers
    • http://files.dcequestrianimports.com/uploads/1/3/0/8/130874432/gubametex_vudukumo.pdf
    • http://files.iepconsultingwithcatherineevans.com/uploads/1/3/1/4/131406082/vuzezevogojusu.pdf
    • http://files.wadyra.org/uploads/1/3/0/7/130775518/7039444.pdf
    • http://files.yuliyaosyka.com/uploads/1/3/1/4/131453260/mufogefetopavefanife.pdf
    • http://jidumofob.centerforpilates.com/uploads/1/3/2/6/132682137/6833734.pdf
    • https://cdn.shopify.com/s/files/1/0430/6072/3865/files/kunojifowotokiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdf
    • https://cdn.shopify.com/s/files/1/0434/5859/2921/files/sinisodekosuzupuzamirune.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/spdr_msci_acwi_imi_etf_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/american_english_file_2_teacher_s_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9279/5801/files/vomelirexizobabemuduvunet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/sql_server_2016_free_64_bit.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_off0000831c.bin
7054202772682b24f11599058d951f637b8cd39cbb91149f9ca434d6f8725165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831C 3304 bytes
font_01_sfnt_off00008f01.bin
d103c6eb8ef828a2529526d83471cf92ca8935f2aba32063862e0805b944ca5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F01 5204 bytes
font_02_sfnt_off0000a0c9.bin
a9953f5eca1df68f38ba191dd02d7625dbe99dc24b2ff2913bcc688de27bb018		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0C9 10320 bytes

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