Malicious PDF — malware analysis report

Static analysis result for SHA-256 4380428663b48e7c…

MALICIOUS

PDF

36.9 KB Created: 2020-09-14 03:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5364d52b6fe9bc083f4cfff7fb82d5a SHA-1: 3c1c6792a756fa260ff5679a1cda5989381dcd12 SHA-256: 4380428663b48e7c3f78458c31f77e05db33303d89f30803a041e5d5e289b906
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.me/wix?keyword=super+mario+bros+play+unblocked`. This URL is presented within the document body, disguised as a link to play Super Mario Bros. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains. The primary malicious URL is the most significant IOC, likely serving 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.me/wix?keyword=super+mario+bros+play+unblocked
    • https://static.usrfiles.com/ugd/808d8c_574ac11ca2e440848c9ddea5500732d7.pdf
    • https://static.usrfiles.com/ugd/938c70_07a62498b5084c2cb8a598238815c527.pdf
    • https://static.usrfiles.com/ugd/ab0441_9167749a4466479b8d30cff224375b86.pdf
    • https://static.usrfiles.com/ugd/787b0a_a0e97843c24f42b5809902c50856dcd3.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/fundamentals_and_applications_of_nanomaterials.pdf
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/niginatapajiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0103/6443/files/yiruma_maybe_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/bungalow_house_plans.pdf
    • https://cdn.shopify.com/s/files/1/0439/0505/6920/files/tumaczenie_zda_z_polskiego_na_angielski_wiczenia.pdf
    • https://static.usrfiles.com/ugd/575fb0_d3c3575d4fe74cb288b542c0d2343c34.pdf
    • https://static.usrfiles.com/ugd/ea2f88_96d922dd885845f8967726b6d02357c5.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_53457c503b28470eae79f6e5ec5e5e13.pdf
    • https://cdn.shopify.com/s/files/1/0483/7215/4528/files/crossfit_bodyweight_workout_resource.pdf
    • https://cdn.shopify.com/s/files/1/0463/2569/4619/files/44075850317.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/76599354746.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_off00005101.bin
32213c71ad53d260f6eee453683d1cbfe24aaf50ffe3618dbbb481a0a22099e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5101 5628 bytes
font_01_sfnt_off00006408.bin
dc8c04dcac52ebfc8134167a65ff91d7a5334a0993b07c5d0156c7789da1479b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 10388 bytes

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