Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffe52a546d5790d…

MALICIOUS

PDF

41.4 KB Created: 2020-09-01 03:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b59df97e7a4fd422267e6a0da71e35e8 SHA-1: 277b6cd0bfd2f9a36819624c7519bde301038391 SHA-256: fffe52a546d5790d05e43b54acc2bebc00db8a71c67dfc128ebb97791ab7d000
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded external links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that aligns with the observed malicious link farm behavior. This suggests the primary intent is to lure users to malicious sites.

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=budgetary+offer+template
    • https://static.usrfiles.com/ugd/b8c837_84db9e038b76482c880203a6b52351f6.pdf
    • https://static.usrfiles.com/ugd/865d50_7104baa4e5494b078be81f6c44a2ad7a.pdf
    • https://static.usrfiles.com/ugd/fedf23_978bd217905348a58b0e91387bd741cc.pdf
    • https://static.usrfiles.com/ugd/07e02c_11f6229c49474721934ab49321573274.pdf
    • https://static.usrfiles.com/ugd/a107db_e54b154004f7458b805b026684de6c62.pdf
    • https://static.usrfiles.com/ugd/cb2bed_7864e4277fcb4c7192020dc038a12ec4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fe96398855f4d048e96f12be3ad5e5b.pdf
    • https://static.usrfiles.com/ugd/a91264_ae460774cb2846698781fbb35dc0655b.pdf
    • https://static.usrfiles.com/ugd/4b874d_27d555dfd6df4421b74bc565943687bb.pdf
    • https://static.usrfiles.com/ugd/0df15e_a7ea11efb4904404b3e65f91016d5e45.pdf
    • https://static.usrfiles.com/ugd/77941b_cde3075a1e0f4123b7c8945e8d231638.pdf
    • https://static.usrfiles.com/ugd/d54300_4e1cd4cbaed1467b95a0a0e506ebcf4f.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_f658c733b5da4a12a9bb2fe7129503df.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_off00006576.bin
6c9a2eb547a43d650d003732d48ae3175d8716e7a03260d3f169bee3e7bf9f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6576 5332 bytes
font_01_sfnt_off00007793.bin
9f94a648844715a4b3e7389ee52eab13009fca0fdcb600f9c6793406b101a34a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7793 9924 bytes

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