Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4bc0e6289bb12b…

MALICIOUS

PDF

38.0 KB Created: 2020-09-16 15:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf6acc4ca08892c1300bf3bdc1c981e9 SHA-1: 78a17865c9a10389d4675a52070140aa5ca035f1 SHA-256: 0e4bc0e6289bb12b1a4729e7eca1203cf2f949ec5929febd742b206dea59a62e
194 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classification and heuristics. It contains numerous links to external PDF files, a common tactic in SEO link farms and potentially for distributing malicious content. One of the embedded links, 'https://ttraff.club/wix?keyword=iise+regional+conference+2020', is flagged as a known malicious redirector. The presence of advance-fee scam language further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=iise+regional+conference+2020
    • http://files.nzlifeontheroad.com/uploads/1/3/1/3/131381241/4729705.pdf
    • http://xitewokux.edgeofthewilderness.org/uploads/1/3/0/7/130739349/vuwatajomuwuvod_pebukunepawaxu_sowotibexo.pdf
    • http://revar.waukeshacountyconservatory.com/uploads/1/3/0/8/130813694/5346410.pdf
    • http://toxigi.montclareschool.net/uploads/1/3/0/9/130969027/budejupazolobim.pdf
    • http://files.lightandshinedesigns.com/uploads/1/3/1/3/131379183/latonevifesaba_xiroveseja_pexolotun_lusilerolatug.pdf
    • http://files.katiemanthey.com/uploads/1/3/1/6/131606256/6930696.pdf
    • http://paxed.topnotchmanagement.com/uploads/1/3/0/9/130969077/872573.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7a461aa6-de8e-4238-9056-c66bf424fbee.filesusr.com/ugd/b56239_ad59eac179db47dc81844d84c0f4cf58.pdf?index=true
    • https://23058313-814f-4e70-83bc-8a8849f83ee4.filesusr.com/ugd/f08e01_a886450db3364de6a712df11a8c56bfa.pdf?index=true
    • https://77c881b4-cdde-4fb2-9c48-2738d09094d7.filesusr.com/ugd/7be1cd_340074ff409e45148f332f5516fbb921.pdf?index=true
    • https://450e13dc-ad72-4f44-b59b-1c6a7b952725.filesusr.com/ugd/69695d_77bfeadee0524cf49f35ba2e8a34d302.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/pojufopogeparewonagejesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/vagejodojewamukovovobabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7390/4545/files/free_printable_christmas_worksheets_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055c9.bin
43412c6cdcd4011a4f75d2f719cc8f560df06a4e552287c7cf7388cf7429b02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C9 5260 bytes
font_01_sfnt_off000067be.bin
9272acd727bec779a0b100d5a638396c36e71df6e1851fde22aad1b963adf323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 10368 bytes

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