Malicious PDF — malware analysis report

Static analysis result for SHA-256 0196385cf0200e1f…

MALICIOUS

PDF

32.9 KB Created: 2020-08-31 02:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2fea62fff42243615dfbc23a1edafd3 SHA-1: 84540c23650d1d5f2926483995294f20a3f72fd2 SHA-256: 0196385cf0200e1f90249f9a3f732472ba768f284dbc634c801c39a351d249fb
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, forming a link farm. One of these links, 'https://ttraff.com/wix?keyword=training+tenor+voices+richard+miller', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware delivery.

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/wix?keyword=training+tenor+voices+richard+miller
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/76b6de_4e232cb92004451f8381304ac084b8f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_efae3432b1644de8aedfe7410be1d3af.pdf
    • https://static.usrfiles.com/ugd/68ec51_3d03cdccafb34cde83a4dc136af8335c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d6106cfc0bd43b7b1ea0ff65e68cf24.pdf
    • https://static.usrfiles.com/ugd/e4ff69_d32393d995484c549c7e505be96477f5.pdf
    • https://static.usrfiles.com/ugd/10a4aa_c5dd1d93da2e4215b9ef384e41e28f36.pdf
    • https://static.usrfiles.com/ugd/eb4c03_bdd46b5576ba466585845d0698de5ce6.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_fbcbd23ac90849399b7fc58d27f1c871.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/tatewikijukarosagupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/case_files_obgyn_5th_edition_free.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_off0000426c.bin
a484ff06e36f658d07cc0efca803ee3dd54a5625a10804627c5541a7c9ace2fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x426C 5364 bytes
font_01_sfnt_off0000547c.bin
5600e12f1dba1a6b8fd27b7fd75b014a7a1a1f2fdb18b81e8125c2f19f44e75e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x547C 10240 bytes

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