Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a4d2468a937a9c…

MALICIOUS

PDF

42.4 KB Created: 2020-08-29 13:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bec508f87382cc02e923b7c5dabdf35 SHA-1: 8938cefa5524039397833f729ade8bed3f8eba4a SHA-256: 41a4d2468a937a9c35c23a0ada3bd9fd33cf9211549ac22de392336cf8159383
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One of these links, https://ttraff.ru/wix?keyword=adobe+illustrator+cs3+free+download, is identified as a malicious redirector. The document body text also contains references to downloading software, suggesting a lure to trick users into visiting malicious sites.

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.ru/wix?keyword=adobe+illustrator+cs3+free+download
    • https://static.usrfiles.com/ugd/89064d_a392e431d528493f8ab2d1f1a2620d97.pdf
    • https://static.usrfiles.com/ugd/4cf28d_1d89555b1809447d89fb4f7cff425565.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f693ccbc5d6437c9ed79c805889af93.pdf
    • https://static.usrfiles.com/ugd/b8c837_9436f4bf0adf43519e33418329dfb0f1.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/subject_verb_agreement_worksheets_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2959/files/nokakiliregakamenig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/chapter_4_time_value_of_money_solutions.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c206f1c44d043f999a4bb4ab4a159e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_455f551428b740809a72f88b29ea7ddc.pdf
    • https://static.usrfiles.com/ugd/b8c837_84efde7250314dec8f068c642ff89482.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbf301310c37449da8ce013044bda3e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6e6887b4b144017b5aa2f4f87ceb8a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bc0d0d172014da7ab1951e5b53d763d.pdf
    • https://static.usrfiles.com/ugd/b8c837_56b12172fd954cb7be43318321bb1f0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8614395f95f14a9492019aaa4f76754e.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_off00006531.bin
4b84dd4cb450880371c042dda42b0baeedc698227f139825d6d907c68d4b524a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 5400 bytes
font_01_sfnt_off000077a8.bin
88be91c3897c6c6eb6716b9e8a2d592fa6cb0920f13c787860bab14a7d9eece3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 10788 bytes

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