Malicious PDF — malware analysis report

Static analysis result for SHA-256 e210264e451e3504…

MALICIOUS

PDF

77.2 KB Created: 2020-08-15 04:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed027ca27d051e09ce3daf9a0c0c4b65 SHA-1: 3f3375c97c475a236ebc66d8eedc298e446f2396 SHA-256: e210264e451e350423a78c3a1d1c9cd310eb77fd4fbb7b826b9b272c47340259
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with the primary one leading to a Shopify domain. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=vande+mataram+lyrics+in+tamil
    • http://files.knickknacknook.org/uploads/1/3/1/6/131636903/5636613.pdf
    • http://difokutu.durhamcontractorstx.com/uploads/1/3/2/7/132740961/nowebedipodamonotu.pdf
    • http://wubodoka.webproxyforfree.com/uploads/1/3/1/8/131871395/nedurime_pinenates_zopukevup.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/crunchyroll_android_tv_app_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/linked_list_c_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/41597819683.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/mind_on_statistics_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3816/files/principales_agentes_economicos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/46510383457.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/63647163246.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/25410594559.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/70353003881.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001035b.bin
dc027ba0e2236aedfc1f9d881864ba2f40f58eeb63d53d9ef20aa4d05b5db174		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1035B 11260 bytes
font_00_sfnt_off0000adf2.bin
64e83e2f19a2f8adef7019f8f7c95313f3105cbb21a3bf0d85e74423cc431ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADF2 5152 bytes
font_01_sfnt_off0000bf5d.bin
4ce8d24015ce18b0682f2f0a26bf67352abd2dba2689a1f94f7c3f29ec80fe2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5D 9832 bytes
font_02_sfnt_off0000deaf.bin
9bc6cf7cfd2afcbf7bb46913c179a3da086b850fb514802e934a945279dbc308		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 11120 bytes

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