Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6937667fef745d…

MALICIOUS

PDF

33.8 KB Created: 2020-08-30 10:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d9920104cfae2e39eb49e18775af00 SHA-1: 3aa5f1f5bbfef826dd52855502fdfd71f715a227 SHA-256: 1e6937667fef745d2df00a7ed7259114cb668ea442c1ef23b9abdda9838ce47f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify and static.usrfiles.com domains, suggesting a link farm for SEO manipulation. One critical heuristic firing indicates a direct link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=ways+of+the+world+ap+world+history+third+edition+pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/bwv_1001_adagio_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/panodipaguronugejawobodak.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/bowojut.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e55b0cc4d754c5d9fd1f23723768bd5.pdf
    • https://static.usrfiles.com/ugd/83f04e_1215274768e34747a4a2df647c7288ef.pdf
    • https://static.usrfiles.com/ugd/9e53d4_08356b1e5390499aba0faabea74e04d5.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_7ae52f6b3d33440d9f27ce4011d914fd.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/58612599749.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26450283228.pdf
    • https://cdn.shopify.com/s/files/1/0430/6747/4087/files/15861395958.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/membuat_bookmark_online.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce9bef7a5b524514a2015b534cdf4826.pdf
    • https://static.usrfiles.com/ugd/b8c837_941cb09722124005a9a745a8750c1b6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_32af411ec13b4b5586ca4b5e2a8b5380.pdf
    • https://static.usrfiles.com/ugd/b8c837_46c7f042c1614a3a9140d12426ce09ac.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_off0000465a.bin
b0e4a1eb642a15c386038b65e11c9323fb0ee07a51eafd14c94b3ec097d7170c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x465A 5336 bytes
font_01_sfnt_off00005892.bin
f74db34f078f913fdb2b959817185575a4e9cc057cba1a8b4b7a730e61cf6acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5892 9756 bytes

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