Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb9c6e7e9275e95…

MALICIOUS

PDF

42.7 KB Created: 2020-09-04 01:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fa5044ab7239615736484d3412ec6a6 SHA-1: 560497da1b94b7f0803ed665e53a47feabad8756 SHA-256: 3eb9c6e7e9275e9575a3e4e98145ed29ec89ef586d056023e62d31c31bef5b4e
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, a common technique for SEO poisoning or redirecting users to malicious sites. One of the embedded links, 'https://ttraff.link/wix?keyword=taiwan+arc+health+check+form', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Taiwan arc health check form', suggesting a lure to entice users to click the malicious link. 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.link/wix?keyword=taiwan+arc+health+check+form
    • https://static.usrfiles.com/ugd/3b0c81_21e777ebb9424af5a3214c9ea7a87d93.pdf
    • https://static.usrfiles.com/ugd/4d400c_d7c3a24aea234b939d67fa1057bdd1f2.pdf
    • https://static.usrfiles.com/ugd/a107db_4f9a970888e84d97b599da298c7aeb80.pdf
    • https://static.usrfiles.com/ugd/fd30ac_0fc5f5aca0e342418bb0cf58984197a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_24eca2a73b324c8b913d0c713845b476.pdf
    • https://static.usrfiles.com/ugd/964009_ca3faff2ab98430baebd2fe2846d9aaf.pdf
    • https://static.usrfiles.com/ugd/4bb894_5eaae971963d45708184cc6da8a0fcf6.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/zetesofulufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/57595750872.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/zezusozifipugibabazedimi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0055/files/84124224138.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/public_policy_formulation_and_implementation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/53892609973.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/ponipofajoposaluseletufaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/that_was_easy.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3245/files/video_helper_ard_mediathek.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_off000068f5.bin
72cb6d0a8ccc8ac602fad15678070440584ebe55d2fc8fb63321215f3aad1d59
pdf-font-stream PDF embedded font (sfnt) at offset 0x68F5 5048 bytes
font_01_sfnt_off00007a0e.bin
b417807af6f3f1a7d0040c3a287edb2511087ab43bc8f03589a6429c0f34f119
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0E 10588 bytes