Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a2679f1b83ef6f…

MALICIOUS

PDF

48.9 KB Created: 2020-08-22 13:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 772e5f6e1bc576cf670520eebd27363c SHA-1: b2e8168a79314fa03261b903b16429ce395c755d SHA-256: 51a2679f1b83ef6f5adca868a2c3f282ff36c986b10ce391b2f1d38af8f39052
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=scientific+calculator+app+android'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, one of which is 'https://cdn.shopify.com/s/files/1/0439/3671/0824/files/fanaro.pdf'. The document body, though heavily obfuscated, contains references to a scientific calculator app and the redirector URL, suggesting a lure for malicious redirection.

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.cc/pify?keyword=scientific+calculator+app+android
    • http://files.aokcollectibles.com/uploads/1/3/1/4/131437276/dubina.pdf
    • http://files.avriltahoe.com/uploads/1/3/0/8/130813588/3915314.pdf
    • http://files.taurangacivicchoir.org.nz/uploads/1/3/1/3/131380292/eb77b75a.pdf
    • http://files.chrissyandlee.com/uploads/1/3/0/8/130814515/2470298.pdf
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/fanaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/19278534332.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/corresponding_and_alternate_angles.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/somewhere_over_the_rainbow_uke_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/64181247289.pdf
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/kizer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/minor_arcana_tarot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/fajowababigodufi.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_off0000756a.bin
a307481739ddce07470caac03769453d9b76717a7133bf35b25c8b7784c3e42a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756A 4956 bytes
font_01_sfnt_off00008641.bin
27321b242d2e15d0938881a6e4f6c3df29d0b75fa2c8d7985fff3cc0f511a017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8641 10028 bytes
font_02_sfnt_off0000a894.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA894 4324 bytes

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