Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a4f362adb3e31e…

MALICIOUS

PDF

34.2 KB Created: 2020-08-14 23:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95be458f08651a88ef841a452f6abedf SHA-1: 8fc99d75ede4354f6d0c0f7b7dae32d786a1a737 SHA-256: 30a4f362adb3e31e9cc541d9685eeb1ded8b9d623bf22c1e79ffd6e1ea5b4808
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to distribute PDFs, likely for SEO poisoning or phishing. One of the primary URLs, 'https://ttraff.cc/wb?keyword=business%20vocabulary%20in%20use%20advanced%20third%20edition%20pdf', is flagged as malicious, indicating a probable phishing or malware distribution attempt.

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/wb?keyword=business%20vocabulary%20in%20use%20advanced%20third%20edition%20pdf
    • http://files.emmagardner.com/uploads/1/3/1/8/131856543/910248.pdf
    • http://fosinuwi.perfectfixhandyman.com/uploads/1/3/1/3/131380397/nofub.pdf
    • http://files.taylorabigail.com/uploads/1/3/1/6/131607027/dadipetominofevor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48465164240.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdf
    • https://cdn.shopify.com/s/files/1/0449/4488/3880/files/national_anthem_usa_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7357/5841/files/porobexudilepozax.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/29888316705.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/92687104833.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/1566171740.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/a_dark_room_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/xexosudewuvuxitudivegepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/62825078718.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_off000043fa.bin
08d53f8b4c272eb584f5f80aa8d574a850cd6d499d4c43bc0316ce41fa4750bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43FA 5596 bytes
font_01_sfnt_off000056f7.bin
2857a244e288853376832e662ebe7bde469afc192ddd7624bbcb5ba72a6d0b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F7 10216 bytes

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