Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da7566aef914ff6…

MALICIOUS

PDF

43.7 KB Created: 2020-08-29 02:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 646a995958e48a3e6308b771e206235c SHA-1: ec8a7e9934d934506aadd626e7f776008570e346 SHA-256: 4da7566aef914ff6afcffd2c67add51c427c9934b8dbdca070818a6ffc283ffa
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 pointing to 'https://ttraff.com/wix?keyword=accu+chek+guide+me'. The document body, though heavily obfuscated, contains this URL and text related to 'Accu chek guide me', suggesting a lure to a malicious site. The file also contains a heuristic for a PDF link farm, indicating a potential SEO poisoning or spamming campaign.

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.com/wix?keyword=accu+chek+guide+me
    • https://cdn.shopify.com/s/files/1/0434/4843/4844/files/april_2019_act_answer_explanations.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/17053207285.pdf
    • https://cdn.shopify.com/s/files/1/0437/8954/9726/files/kaxobiviwer.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d85d3777a84cb6bf354a2aba95f4d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b2aed063c5e409faa55d8d0464ea948.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4947/files/99768683297.pdf
    • https://cdn.shopify.com/s/files/1/0432/9766/9278/files/73566484050.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/soxosifovegepoji.pdf
    • https://static.usrfiles.com/ugd/b8c837_223ccd1e89e34bd7a0ffaf89c4021050.pdf
    • https://static.usrfiles.com/ugd/b8c837_87138a1d72a24928a626ab6d5ac58bec.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_off000061e6.bin
6440bd0f5830bb43c1235f26cfea95f53d1e9dc189d0b044d6e34102c939afa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 4476 bytes
font_01_sfnt_off00007112.bin
dba04f4de27b34c83fc2ecd3f55d0a3842b328719b7dfdafa08f59f8bbc2ea54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7112 10324 bytes
font_02_sfnt_off0000946a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x946A 4324 bytes

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