Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecda40e98157c7b4…

MALICIOUS

PDF

116.6 KB Created: 2020-08-05 14:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f81a92cb37e6fa20b9452ba2e22bfe SHA-1: d0b3382d948874fa115094bed3a3d58e5ed51432 SHA-256: ecda40e98157c7b47523a6184945de11be7267e243f2c3e4603fbffbf6c1c6bb
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=hinduism+and+buddhism+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on CDNs, suggests a link farm or SEO poisoning tactic to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=hinduism+and+buddhism+pdf
    • http://sonetuzet.eversweetny.com/uploads/1/3/1/4/131438477/wanujuxabifamaz.pdf
    • http://files.hopebible.us/uploads/1/3/0/7/130775978/xazakegote_wapezateg.pdf
    • http://files.bowlrevs.com/uploads/1/3/0/7/130739764/pafimuzarenib.pdf
    • http://files.aryanbhasin.com/uploads/1/3/0/7/130740018/8157110.pdf
    • http://files.ambrosescholars.org/uploads/1/3/1/8/131855992/tiliben.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/70053769682.pdf
    • https://cdn.shopify.com/s/files/1/0440/5084/1750/files/xubuvadunejogov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/pebukawegovifutinabibipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/dire_maul_west_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/fapugonugukoduwenob.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4760/files/annotate_with_stylus_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/90319112202.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/wonebupukegetelikero.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/tepogenebeteworubajug.pdf
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/jixunasol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/5579821490.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/45231951295.pdf
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/laporan_pendahuluan_bronkiolitis_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/61512129863.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_off00017756.bin
7eeec8e1341ffb01d89a67841efcece2457a9942e96fb8ed202287bb8e9bbd30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17756 5256 bytes
font_01_sfnt_off00018907.bin
ed085a20012e3fd6b5502a03206ef41a949eb0166a9e3729f803a2f6a9d69d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18907 15496 bytes
font_02_sfnt_off0001b851.bin
d06f77dfaaba4fd9062e327abfee3ecbf7a7dae09642113767bd42437944360e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B851 3096 bytes

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