Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85893d22a9a8fb4…

MALICIOUS

PDF

42.6 KB Created: 2020-09-04 13:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff0080e1ed77551de36f91668b45e813 SHA-1: feb2612c0952f211ea8591d7b4b0f7e6c5ccc726 SHA-256: b85893d22a9a8fb4a781f0a1831143477a001f986ee568bd5745f378fdc7b734
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=911+crossword+answers'. The document body, though heavily obfuscated, contains text related to '911 crossword answers', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious redirector. No scripts were extracted from this sample.

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.me/wix?keyword=911+crossword+answers
    • https://static.usrfiles.com/ugd/158fb9_28218cd71b8f4933beb2a73314d2cb6e.pdf
    • https://static.usrfiles.com/ugd/64e449_ad52dd42391145bd8a776799a5648835.pdf
    • https://static.usrfiles.com/ugd/b8c837_80b339e3f82c4f2c8637ac3e69e48c4c.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/98323871988.pdf
    • https://cdn.shopify.com/s/files/1/0432/1397/9812/files/xuvufanuxutelumazisa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8891/1267/files/nurukevimigefirevo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5393/8853/files/emiway_bantai_ringtone_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0485/files/criminal_case_cracked_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1160/files/bikhre_moti_islamic_book_in_urdu_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/libuzefanetalafatixelivud.pdf
    • https://cdn.shopify.com/s/files/1/0434/8225/1421/files/wekute.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8541/files/sofisaxovajitelilare.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/9837021896.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_off00005daf.bin
857590f0d4c7e9a274d59693236ea6ebdf07e85879a6be407905b80b86535002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 4764 bytes
font_01_sfnt_off00006de4.bin
34ad80739400a2523e7e1825e309f987338d4b05010080844ef0ea102675f080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE4 9980 bytes
font_02_sfnt_off00009006.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9006 4324 bytes

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