Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74e2de23bced953…

MALICIOUS

PDF

44.8 KB Created: 2020-08-29 03:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75bd6418af2f8a701fda00a10bd567eb SHA-1: 7c305cc84091b0b7791732e26704ca5d85e3ea95 SHA-256: d74e2de23bced9533492b8e3ef105f49e35bad6fd8a9de52c24f5a13c943e6a1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used in SEO poisoning attacks to drive traffic to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains references to the redirector URL and a large number of benign-looking PDF links, likely part of a link farm designed to improve search engine ranking for 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.com/wix?keyword=battlestar+galactica+season+1+kickass
    • https://static.usrfiles.com/ugd/b8c837_a5fdf1e2391744ed851fe6f5b12bb720.pdf
    • https://static.usrfiles.com/ugd/b8c837_26b44f289cf9405e9b6eb01e7ceb64d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c4222a2bb39416ab97e7e796939993d.pdf
    • https://static.usrfiles.com/ugd/b8c837_994f233a8f7142e2aa9eb3e797c90b38.pdf
    • https://static.usrfiles.com/ugd/b8c837_dee5f9119ca9496b8e257bf3d5b4446f.pdf
    • https://static.usrfiles.com/ugd/b8c837_fff4a1a33b414fc487634831813be6a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c39cca5ea2a2450da83b26da7ed0ae21.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/evaluating_function_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/artemis_fowl_the_eternity_code_graphic_novel_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/feregixinopezuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/nufeporepifaxujigavew.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/keynote_template_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9789/files/53673344820.pdf
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/gofexumunosiwudopu.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_off00006544.bin
ac41fca23f4328f98df31cfe5066e2d1699d1d661e7363346c959fac4a7123ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6544 5132 bytes
font_01_sfnt_off000076d0.bin
93170806810679c81060eaf5c6f3ee303564f40d42159748303241dce86faae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 15584 bytes

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