Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f63764c1bb08e15…

MALICIOUS

PDF

40.9 KB Created: 2020-09-12 18:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5156aa62d7cd2b237eca5f7df2f7894 SHA-1: a9605da6efa205951cfab4e6b79be6eb5e781b77 SHA-256: 6f63764c1bb08e152e98e21b216d0dce8a8da036ab8144bcb498e21975e30c77
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=pharmacology+and+the+nursing+process+study+guide+pdf', which is flagged as malicious. This suggests the document is designed to trick users into visiting malicious sites under the guise of providing a study guide.

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.club/pify?keyword=pharmacology+and+the+nursing+process+study+guide+pdf
    • http://files.pacificrimbusinessconsultants.com/uploads/1/3/1/4/131453006/2626862.pdf
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdf
    • http://misefiz.cambridgeintlschool.com/uploads/1/3/1/3/131383541/bced432f6.pdf
    • http://files.calgarymathtutor.com/uploads/1/3/2/8/132815054/xajavibedejo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/784815_ac7d3d0b8f984cdf9ff98d90e28a4c63.pdf
    • https://static.usrfiles.com/ugd/221f3a_3e5d38b154284f5eb1dfdb18aeb62fa5.pdf
    • https://static.usrfiles.com/ugd/430cb2_57c866a6240347fc8ac3fb4d41ce3092.pdf
    • https://static.usrfiles.com/ugd/2c608b_8792e8366c814be3ab9ec86824fbbed7.pdf
    • https://static.usrfiles.com/ugd/0511f5_001a2f1581b14e71ad10fe664e9aed16.pdf
    • https://static.usrfiles.com/ugd/c618e9_93b2b00cfada4288a53dd901ae5208ef.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/62146885060.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/amelia_island_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/61624582525.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_off00006029.bin
8543c6686129bfe99d3172fdadac9eafef483bd010d18fcb824fd0a7da2de936
pdf-font-stream PDF embedded font (sfnt) at offset 0x6029 5672 bytes
font_01_sfnt_off00007354.bin
cba1030f7b987a29540585826355d5895bc169dbca57d234dfc73497a5568d95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 10492 bytes