Malicious PDF — malware analysis report

Static analysis result for SHA-256 019fd96c16c3775f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 05:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1276f360a5fee9e00843ab1a6ef63dfb SHA-1: 5f547394c4438189d05928b98258cfdc96784407 SHA-256: 019fd96c16c3775f88e29fafb07d6d00d5daaebc96f04252224d0700233c1644
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/wix?keyword=production+time+study', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating its primary purpose is to lure users to malicious sites.

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=production+time+study
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_04fa874a83df4c588b913a7b1eb74058.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_9ae07bc77fe74b0ba4c90204c1c1966a.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_ee60d9be3fb64000a46500067576f48f.pdf
    • https://static.usrfiles.com/ugd/599026_b530e8c532ab4147aac8189c18829d2f.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/2921894926.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/mddus_annual_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/99948968329.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/10969582650.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/19600595065.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec91ed554d8b4c7890fbe5ab775b1a12.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_88797cf468c64f2ba4710e6c66098c91.pdf
    • https://static.usrfiles.com/ugd/d1c05f_7a79b5e52cba4e70b0968993906fd7ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_f21874f4e02c488e9fd7f7abb3329ddd.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_off00006705.bin
9a25a285605c15678d40a6292c252bb1c9128328d6cc9147c7a864fe44d4a9c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 4948 bytes
font_01_sfnt_off000077c4.bin
7b204519e6f9c7b4d7cf6a30db1bf72d99f1a346efb25b575b11382b9af072fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 10192 bytes