Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02367884d7b0e74…

MALICIOUS

PDF

56.4 KB Created: 2020-09-01 13:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ebde06edb41b730dc8832f924bb9821 SHA-1: 721af02c1d8bc742a2312870f7c3f353f4e7d1c2 SHA-256: c02367884d7b0e7410b47d46c47af8a5a6abbbfb7e41209123fb5bc16ae9c0af
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious link directs users to 'ttraff.com', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the 'hollow knight wiki guide' and the redirector URL, suggesting a lure to a malicious site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to obscure the final malicious destination.

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.com/wix?keyword=hollow+knight+wiki+guide
    • https://cdn.shopify.com/s/files/1/0444/1374/7367/files/tunusabumofepibiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/72954239862.pdf
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/xuterapiruzugupivimapewa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2215/5930/files/formato_apa_2020_bibliografia.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/nolijetovib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/gepewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/kalender_2020_thringen.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/git_reset_to_remote.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/growth_and_decay_word_problems_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/12393173386.pdf
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/windows_7_sa_stika.pdf
    • https://cdn.shopify.com/s/files/1/0431/7023/4519/files/gta_san_andreas_ps4_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/22654486431.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/balanced_unbalanced_forces_worksheet.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_off000093eb.bin
d812019302384f0f92b207bd99c65b84f8505225a96d8bf6224fa34dee6c88e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x93EB 4600 bytes
font_01_sfnt_off0000a398.bin
4a959d4d9c81f97ede5b5f741a94886b69447cd5b2905618e55908222500aebd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA398 10392 bytes
font_02_sfnt_off0000c6f7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F7 4324 bytes