Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae0777c4487facf…

MALICIOUS

PDF

34.1 KB Created: 2020-09-03 06:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a67c945562d211a450f8fbfd850383e8 SHA-1: 051f56e045dd00c476b7c2769c05332c79605e99 SHA-256: 3ae0777c4487facf48e3274395e19879c5cce971d7f7ef705d1ea83903a73dcf
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=tauben+vergiften+im+park+noten+pdf'. The document body, though heavily obfuscated, also contains this URL. The presence of a link farm and the ML classifier's high confidence score further support the malicious intent of this document.

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=tauben+vergiften+im+park+noten+pdf
    • https://static.usrfiles.com/ugd/0582e0_ec8e54b4c53d4a348599915b2f009762.pdf
    • https://static.usrfiles.com/ugd/5be868_71d4d8c432ec4e16bce7e1f47be21236.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cd1557c1c2947198157ca595f286777.pdf
    • https://static.usrfiles.com/ugd/b8c837_389059187d1540128dd43bb3af467f14.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_2cf0c298fa634e11a9ceffe0b3d59a73.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/vitamin_d_supplementation_and_prevention_of_type_2_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/molop.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/gudizarojegibom.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4831/files/tamil_alphabet_chart_with_english_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0437/1539/5738/files/9394479720.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_off00004707.bin
3f0cbcf92acf594f5f33b4dedace024dc0cafb624497585fe95182d503f94e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4707 5364 bytes
font_01_sfnt_off00005941.bin
0399cc9a0665ae230bcc69fe73ef9728ee784877bf5fc03ff0a4d2a937c597dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5941 10396 bytes

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