Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f18e30bed3b505…

MALICIOUS

PDF

47.3 KB Created: 2020-08-09 13:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e23a6928b2f9f69bad0f2a4a97c15bd SHA-1: 178f2e3ebb3d3ab2002954a2ae4cff4390fbaf79 SHA-256: 63f18e30bed3b505b61f386262616250c1f70ad6016b343e83a6b71202262d8a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse. The primary link redirects through 'ttraff.com', a known malicious redirector, to a PDF file. This indicates the document is designed to lead users to malicious or unwanted content, likely for traffic monetization or further compromise.

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=panchatantra+stories+marathi+pdf
    • http://vepoket.njgraniteconstruction.com/uploads/1/3/0/7/130739024/c7c7b20.pdf
    • http://files.clydetownshipscc.org/uploads/1/3/1/6/131606631/rajaruvedudo.pdf
    • http://roleguj.oscarkoolkidz.com/uploads/1/3/1/3/131381078/0f48bc4f1fd7785.pdf
    • http://files.thebarllc.co/uploads/1/3/0/7/130775402/1138329d7.pdf
    • http://files.yoganess.net/uploads/1/3/2/7/132740951/a3bb9e7b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/0219/9203/files/brahmanda_puranam_in_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/6080221441.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/optional_attendance_form_tdsb_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/49023622284.pdf
    • https://cdn.shopify.com/s/files/1/0449/4855/3887/files/practical_thermal_design_of_air_cooled_heat_exchangers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/73056167301.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/8001/files/ecosystems_theory_in_social_work.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/vokuzixerubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/19621902669.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/42301479442.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/kegodome.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/66400227095.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/64462039419.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cdb.bin
85d69b0dac199d1098736746f5d6d62e07d1466b3b4dcc7adb7fd3743d32fed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDB 5364 bytes
font_01_sfnt_off00006eef.bin
2c652eec377469a9cc54b5689800f811634a27e3fc3d0b226eb02e79097548b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEF 10304 bytes
font_02_sfnt_off00009274.bin
60089c8bac12a50275b97209a4ad52c10c2a97d0b0954fe2ffe0421ee4c3ff4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9274 8968 bytes

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