Malicious PDF — malware analysis report

Static analysis result for SHA-256 be102c25e7960fae…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 03:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e651fa8687df9888265b11d3b07db9e4 SHA-1: b6d150f685a06732ccfe9c8c4131eef79938fca4 SHA-256: be102c25e7960faea76498387bdeb162c5f50bc761a14cd710e820171cb34df1
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though partially garbled, contains text related to 'Effective english speaking skills pd' and embeds a URL pointing to 'ttraff.cc'. This suggests a phishing or scam attempt using a lure document to redirect users to a malicious site.

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.cc/wix?keyword=effective+english+speaking+skills+pd
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/puzuzikevi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4584/5152/files/vitisiwolisapoluteguwag.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/florianopolis_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/holistic_assessment_in_nursing.pdf
    • https://static.usrfiles.com/ugd/68ec51_79b54913349041f38560a5e118ac20ed.pdf
    • https://static.usrfiles.com/ugd/fd30ac_055baedabe7d444493f8aa9ef44d1ebb.pdf
    • https://static.usrfiles.com/ugd/33a2e4_a42b71c1a038425eb0943c8b8fd2166c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca084c4f7b0541d7baabb864e8fe120d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b0978d96f8c45b39f765347f84a02ea.pdf
    • https://static.usrfiles.com/ugd/d17951_71f0ca9618a74958ac22159649ffbc69.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_off000060d8.bin
5a3ab4976b4632b7f6bea9330631f5b535b3f85e639208cddef5d60fc025c029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8 5400 bytes
font_01_sfnt_off00007343.bin
1949d70c9ad1700f659c999c90e8c4051d4947d6b5402c10abf3d6a6846a9df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 10128 bytes

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