Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba10950945df0b5d…

MALICIOUS

PDF

42.5 KB Created: 2020-09-04 21:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41773fa79f6bdae681864d75140919f4 SHA-1: 97b44fb28d0daba25e8a7f2212679820472958b5 SHA-256: ba10950945df0b5d1c1f9aa9e9fadbcae11f45d7ad432b941877bc939df7aea4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, directing users to a URL disguised as a worksheet. The document body, though heavily obfuscated, contains the same malicious URL. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely to improve search engine ranking and distribute malicious content.

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.link/wix?keyword=times+table+division+facts+worksheet
    • https://static.usrfiles.com/ugd/cc207a_4ae96f6a5ca24d369916a121b0df5138.pdf
    • https://static.usrfiles.com/ugd/b8c837_846cbd662fc240b78d6bf86dde6688e6.pdf
    • https://static.usrfiles.com/ugd/3d7af5_85528d85a03e41ce8869a50aa33ec218.pdf
    • https://static.usrfiles.com/ugd/ad8f3a_37695c782a894200bbc0436726530b1a.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/printable_blank_template_letter_from_santa.pdf
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/kabi_khusi_kabi_gum_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/22335493447.pdf
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/php_decimal_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/heroku_custom_domains.pdf
    • https://cdn.shopify.com/s/files/1/0432/2014/0191/files/lelasezaxupovuzeje.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/negidi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/75421040958.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/org_chart_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/nuvitewibefosix.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9588/files/49222486537.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/angular_7_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/11711849152.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_off000065f1.bin
1213d92e8121784becb6e275cf240e16a10d93f88726a5ba04b0f05d94a7fdcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 5564 bytes
font_01_sfnt_off000078c2.bin
4f4e580bd9af3ce88a2869f17f5619f291d84e8581b3a130be6d6e899f8979aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C2 10524 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.