Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb09e10c6a78fe6…

MALICIOUS

PDF

47.6 KB Created: 2020-09-01 07:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72e47c3f0074292d9ff674b8c5be2007 SHA-1: 5be384e009e0810977bb2095d1964360a0fbcec9 SHA-256: cbb09e10c6a78fe667999a6c2bdaa0bc1b13c1008a951f7af2c226ee249878cf
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=bacchus+marsh+weather+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are benign but serve to obscure the malicious one. The document body, though heavily obfuscated, contains the malicious URL and benign-looking PDF links, suggesting a lure to a malicious site disguised as a weather report. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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/wix?keyword=bacchus+marsh+weather+report
    • https://static.usrfiles.com/ugd/90c678_0fd016952ed247b38a771ac8bb43b5ab.pdf
    • https://static.usrfiles.com/ugd/f46427_7fc310177f3a4f569e0cf4565bbfdcd5.pdf
    • https://static.usrfiles.com/ugd/50de67_8d35a939f0cc47c3b5e151884c10fa39.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/avenged_sevenfold_almost_easy_video.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32686583269.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/10124205231.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7250/files/clinical_pharmacology_and_therapeutics_lecture_notes.pdf
    • https://static.usrfiles.com/ugd/b8c837_91508e7358304576842ae55e365186eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2a7f909c2aa42d596bc83264ff99d4c.pdf
    • https://static.usrfiles.com/ugd/585b1d_5e1d60d9d5bf4e158819ba6b486b9049.pdf
    • https://static.usrfiles.com/ugd/b88e3d_82d1a450fda949a5a002e7c0bc05436f.pdf
    • https://static.usrfiles.com/ugd/b8c837_915fbe5ade9346ce8f67f7844ead7270.pdf
    • https://static.usrfiles.com/ugd/97493d_8c1d37dfe9e140eea67b908335a8ae67.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5755428e24941d897f5bc3441f85da1.pdf
    • https://static.usrfiles.com/ugd/fe83c3_d473836de4f2413c8339f33c79a6b698.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_off00006fdd.bin
49bea2d9f21fe50d87c215a296df53cd516031915b51b40fd61815dbaa4e8a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDD 5284 bytes
font_01_sfnt_off000081bc.bin
1609b72ce798f73b3e43945c27f7c38d3625456b9ad02f6f55762afc818af90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BC 15360 bytes

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