Malicious PDF — malware analysis report

Static analysis result for SHA-256 943083a4b9fc704a…

MALICIOUS

PDF

40.5 KB Created: 2020-08-17 05:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8588611a153e3d56ee375db2b37eef24 SHA-1: 07bb13356430bba81801b72813f0e994b21d05ab SHA-256: 943083a4b9fc704a10fb11be31cb84104bc43631872c959623086ca47e4047b9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=release+of+liability+form+texas+template'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains text related to a 'release of liability form', suggesting a social engineering pretext to encourage link clicks. The primary malicious IOC is the redirector URL.

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/pify?keyword=release+of+liability+form+texas+template
    • http://letexiju.lbidreammakers.com/uploads/1/3/2/8/132814930/tasosupam-nedoz.pdf
    • http://files.hermanus-festivals.com/uploads/1/3/1/4/131411539/6379834.pdf
    • http://files.maryrosemedium.com/uploads/1/3/2/8/132814250/kufutiped.pdf
    • http://files.dazzlinks.com/uploads/1/3/1/8/131856339/61bf8f7f.pdf
    • http://rowaw.theuniversalgospel.com/uploads/1/3/1/4/131407668/wukupajerofumisibamu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/75745985904.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/sufopudutesajiver.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/rumozigiwomozutix.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/32243302833.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/cpa_reviewer.pdf
    • https://cdn.shopify.com/s/files/1/0432/9694/8382/files/26562436560.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/28274844467.pdf
    • https://cdn.shopify.com/s/files/1/0451/1694/8633/files/assurdo_tredici_pietro.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/59124320991.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_off00006082.bin
c83dcc359b62f6f8fab0813c329b327a2e70cfa32bfc06223d880d2c7f0230f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 5364 bytes
font_01_sfnt_off000072b7.bin
5034a24ff55c3958e0e1a4c536fd02154cff9f65ee58b1068ad232f77dc7ad8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B7 10052 bytes

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