Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b3e779d1168120…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 09:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b881e0762f928efe4ff4366a06a6870c SHA-1: 807e1ea1f69da7cfe78f3c5f48e212fb7df874cc SHA-256: b4b3e779d11681208d3057d3966a0e1dd5b8f751d17eb0d042e3b4aaac59fa0d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical link to a known malicious redirector at `https://ttraff.cc/wix?keyword=best+reforge+terraria`. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware delivery. The ML classifier strongly supports this assessment.

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.cc/wix?keyword=best+reforge+terraria
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/wexiwafozirikikitalig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/nojafafuguda.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/39911321824.pdf
    • https://static.usrfiles.com/ugd/4725f1_ca7a5b70e68941a1a5f7a2c6691de6fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5d37feffc15469badd09f3a45dd958d.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdfa90182a5d4bc28e25f13ed5d7ec77.pdf
    • https://static.usrfiles.com/ugd/c12414_989337b25fec4e38888853ceeb1fe9ca.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/screamin_eagle_race_tuner_s.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/jolux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/95817149227.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/10201420224.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6067/files/bisizajovasakoxuxikoje.pdf
    • https://static.usrfiles.com/ugd/b8c837_115051585d174e71acad2c1513252438.pdf
    • https://static.usrfiles.com/ugd/822ecd_bdee87a35138444a8400b5a49ee18247.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_fbcb038a7d86483495d3157fa5b768f2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059bb.bin
68df945bd8c0b0f75128c688e36cca6cce9069aecf69b59937a2e05571ecf643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BB 4952 bytes
font_01_sfnt_off00006aa8.bin
21bcec19b35973a11a8ab71fbc00b441f457baf039f559844887c5262ad33858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA8 9864 bytes
font_02_sfnt_off00008cae.bin
f15eb30894f8ee7df28230145856b14975668eea94143637f9e424a97cb9f00e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAE 18028 bytes

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