Malicious PDF — malware analysis report

Static analysis result for SHA-256 102a71f83af1c44f…

MALICIOUS

PDF

39.7 KB Created: 2020-08-30 12:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcec097eee4677e71f19f2a9d6592aff SHA-1: 28953abb76456c06755431ecf966ce48a75682d8 SHA-256: 102a71f83af1c44ffa17cc8fd1bcd9777d67dd0e1cda1cad3ba3de7df74563fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick the user into clicking it. The presence of numerous external PDF links, many hosted on similar domains, indicates a link farm or redirection scheme designed to obscure the ultimate destination.

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/wix?keyword=lg+mesaj+sesleri
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_bab8d139f16d40d2aa89387052243d87.pdf
    • https://static.usrfiles.com/ugd/5926b4_5bb6710637b347a28319b791d74d2627.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_a8c71bf82fd5451d8553ad0ced628a57.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/20941169564.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/57303198608.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/kigupefopitosiruwuzano.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/43480869405.pdf
    • https://cdn.shopify.com/s/files/1/0430/6137/9221/files/tujuan_pendidikan_islam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/mewoguvubasuzujogom.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/quatre_accords_toltques.pdf
    • https://static.usrfiles.com/ugd/b8c837_4467c5b00ebe4e0292dafdbfc202cd1a.pdf
    • https://static.usrfiles.com/ugd/1e32c2_df2aab0eef9f49458795459a98a77bbb.pdf
    • https://static.usrfiles.com/ugd/9c0842_b24162823f104a5784534c6b00a2240d.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_off00004f10.bin
4e6229a3d71dc208139ab07ee22b54b23f377a6db32160a87ceba8133dc9b3dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F10 4516 bytes
font_01_sfnt_off00005e58.bin
8f9b780d82e8b417357d97fef03fd6b60d1b23a6605f540c839974e753126ac7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E58 11408 bytes
font_02_sfnt_off000082c6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C6 4324 bytes