Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa17d4755bd1a4d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 16:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a2a998a9fc58dda2bb42fd52d9658a4 SHA-1: 92eb2896b6dcacbb340b0ff1786bb050f004d67e SHA-256: 8fa17d4755bd1a4dcb4c9c25537ea925a081ca36b43f196d7a68b60efc8d772d
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains references to 'beautiful pictures app free' and the malicious URL, suggesting a lure. The presence of multiple embedded links to external PDFs, many of which are benign, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

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=beautiful+pictures+app++free
    • https://static.usrf
    • https://static.usrfiles.com/ugd/850f07_a67ddf97bf8646c085aecf566c61f327.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcdba029e50f433c80ea3aa3731eb84a.pdf
    • https://static.usrfiles.com/ugd/834936_3ff9669ad4e146a3aaa9784fee4e3ab8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d49cddcac9fe473ba4c0d60ba5c2a61f.pdf
    • https://static.usrfiles.com/ugd/93c935_f1ad80a846fe4103a79761d32063ba7d.pdf
    • https://static.usrfiles.com/ugd/9b5f63_d92e21e3f2d34cf5b4ea3d8e1427a77c.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4746/files/40985702136.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/43396759907.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/wedawoveda.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/50632638884.pdf
    • https://cdn.shopify.com/s/files/1/0460/3340/4068/files/nivel_de_conceptualizacion.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_off00006743.bin
21f94dbfb729f14384b8f27809ca82a7ee0c828825d2bac8680ac7bf19829ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6743 5056 bytes
font_01_sfnt_off00007888.bin
fc965889b0d695facb76512435a624fb7269a647eda7f28994ec4ef581609dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7888 10252 bytes

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