Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6497bdb4d4b0d70…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 19:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 425876e7179bbad01094b1d33d5c5f2c SHA-1: d551fc3f7c71549c0ca1adb09318840908430184 SHA-256: a6497bdb4d4b0d70b23664abdd025b09a77905f8d5994378eec798e7648bdeda
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.me/pify?keyword=abrsm+music+theory+syllabus+pdf', is designed to lure users by appearing to offer a syllabus PDF, but instead redirects to potentially harmful content. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking URLs hosted on Shopify, suggesting a deceptive link farm strategy.

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.me/pify?keyword=abrsm+music+theory+syllabus+pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/word_cookies_strawberry_15_answers_poker.pdf
    • https://cdn.shopify.com/s/files/1/0438/3644/0726/files/ek_ladki_ko_dekha_to_aisa_laga_movie.pdf
    • https://cdn.shopify.com/s/files/1/0445/5625/5396/files/dns_server_unavailable_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/64731852580.pdf
    • https://static.usrfiles.com/ugd/98e298_5922d9cf574947aa9e4a86eff815a400.pdf
    • https://cdn.shopify.com/s/files/1/0448/4674/3713/files/paramphistomum_en_bovinos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8320/files/how_to_develop_self_confidence_carnegie.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/mosexitotiruza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/bemaninaxufudivix.pdf
    • https://cdn.shopify.com/s/files/1/0463/3388/6626/files/6506371591.pdf
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/babakigatawaloxa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b64.bin
a111a0fc82b6449b6404ef1d6d3f9e9e21e16f6f4ffcc46be632b851bcda2c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B64 5628 bytes
font_01_sfnt_off00007e60.bin
c793109604b3b8acdf8833e307e55555736ce25529503c81b256ececea515eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E60 9908 bytes

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