Malicious PDF — malware analysis report

Static analysis result for SHA-256 62415d2d28207a17…

MALICIOUS

PDF

39.6 KB Created: 2020-08-22 16:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f142c43f901a6aa3b74b26efa928de3f SHA-1: 0e461a02590abafeb51ae04baf81d506719c54fe SHA-256: 62415d2d28207a17ed3ea8d82b028e775e38200342e2d204256aafde1da78025
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=design+brief+pltw+template', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=design+brief+pltw+template
    • http://files.visitgather.com/uploads/1/3/0/7/130739028/3042516.pdf
    • http://files.arlenegersonphd.com/uploads/1/3/1/0/131070171/zasamuw_fefegipela_rikimixo.pdf
    • http://fiter.texasredbuddental.com/uploads/1/3/1/4/131453206/7791007.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/75063416738.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/playboy_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/nakifuwar.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6942/files/kepupezuvilef.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/fufozate.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/godedivudiluxabigujuduk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/forest_gnome_dnd_5e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/jakodovuturozon.pdf
    • https://cdn.shopify.com/s/files/1/0433/4292/1886/files/89928728074.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0528/files/diskinternals_linux_reader.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_off00005de4.bin
4a9e4ad521040f657709c3bc44c48bf82a6280adb1a6682bb28976491c8ee29b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE4 5452 bytes
font_01_sfnt_off00007060.bin
dcc344984ea100c598b4af24e0fc24065ade0ef356518bac05d4f64ad3761780
pdf-font-stream PDF embedded font (sfnt) at offset 0x7060 9924 bytes