Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d2da586c86f959…

MALICIOUS

PDF

41.1 KB Created: 2020-08-22 22:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a81fd5e9ba39b343567c807760a92fb SHA-1: 0dbf221db895dce2e2a527255d6b7d750ca305f8 SHA-256: b4d2da586c86f959641b1ba4cf79aa3ddfe8446e6d6e303ca841d837f9fc8e21
150 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 'ttraff.com'. This URL is presented within the document body, disguised as an advertisement for network games. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is 'https://ttraff.com/pify?keyword=best+network+games+android', which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=best+network+games+android
    • http://files.wilsonboosterclub.com/uploads/1/3/1/3/131379761/fesusi-wuzotedunuwefiz-jawir.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7495/files/bimotifenaxigitaruje.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/offenbach_barcarolle_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89832202682.pdf
    • https://cdn.shopify.com/s/files/1/0450/3722/4094/files/gigifoke.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/24442817222.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/5749590987.pdf
    • https://cdn.shopify.com/s/files/1/0428/6208/4262/files/nutugabasizorum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/tebaxemozupogenomojidir.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/41445363133.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0774/files/merriam_webster_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/chip_card_reader_writer_software.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_off000062c0.bin
d50e1e0dd775888962d0195cc184b2509bc66a9e58e97f32546072aaebdfd51a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 5320 bytes
font_01_sfnt_off000074d2.bin
78af27265141bb8325ff9c136339311375b74ed865a7183b0d411764b4d1c989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D2 10212 bytes

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