Malicious PDF — malware analysis report

Static analysis result for SHA-256 952f6602b19b3836…

MALICIOUS

PDF

36.1 KB Created: 2020-09-01 01:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be45ce9108dd05a7744a53b61cfd0c2e SHA-1: eee415b262811044dfb138365727bc2567ad8924 SHA-256: 952f6602b19b383636d0e47ab4234fe4c53b1478a7c6ddcd58b1defa47ef2ffa
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=abrsm+grade+5+theory+book+answers'. It also contains a PDF link farm heuristic, with multiple links hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same URL and keywords related to exam answers, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/wix?keyword=abrsm+grade+5+theory+book+answers
    • https://cdn.shopify.com/s/files/1/0434/5669/2390/files/15188739259.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7056/files/amnesia_otome_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/xijafomudaxarijexi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/xipitunav.pdf
    • https://cdn.shopify.com/s/files/1/0471/0400/0150/files/6_snf_ingilizce_meslekler_tantm.pdf
    • https://cdn.shopify.com/s/files/1/0435/8474/9729/files/negunapagizekixewubezu.pdf
    • https://static.usrfiles.com/ugd/61b8bf_0a49e7db4c9f412cbb094a8a762b20da.pdf
    • https://static.usrfiles.com/ugd/9757e7_f36eb54e7d754b1690e44f02137a79d4.pdf
    • https://static.usrfiles.com/ugd/01bc73_224e685b28d94828af33e4e4a3f49e6b.pdf
    • https://static.usrfiles.com/ugd/80c1db_f48d2ee7e2974ce8a5be767fdfb0100d.pdf
    • https://static.usrfiles.com/ugd/8b97dd_da35853e913d4a98b58e90d44943e89e.pdf
    • https://static.usrfiles.com/ugd/516793_bbc41b3b20b240659dc502c2387e9343.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_off00004e53.bin
0785e8293befb6a692d5495cdf4d7b18e2d8eb0f95d95507f950e33e0b6d917f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E53 5720 bytes
font_01_sfnt_off000061b5.bin
19134b4349184085b3bcc52b059e2fbb450df5bd21545f303a1dd5b4546b308f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 10160 bytes

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