Malicious PDF — malware analysis report

Static analysis result for SHA-256 01686ba86d492553…

MALICIOUS

PDF

35.6 KB Created: 2020-08-08 17:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08d708aa1afb06f1b5196735e7c7033e SHA-1: 5b9dc0e07b7ce92f44bd99650c50ce30d1e8ba67 SHA-256: 01686ba86d492553075ba3262eb461c8bbd180d7ee4748b1135641cbb168474b
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=alkoran+alkarim+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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/pify?keyword=alkoran+alkarim+pdf
    • http://tobobejun.karenfeiling.com/uploads/1/3/1/3/131398140/9203866.pdf
    • http://files.tomhumeartist.com/uploads/1/3/1/1/131164202/buzuboz.pdf
    • http://files.brittanymhiggins.com/uploads/1/3/1/4/131455722/vigunetutas.pdf
    • http://files.artisan-trails.org/uploads/1/3/1/4/131483108/bimajaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5366/1858/files/14564620088.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/28369741824.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/zudikoninebamog.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1703/files/cdr_file_to_converter_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2512/1959/files/git_add_all_new_files.pdf
    • https://cdn.shopify.com/s/files/1/0432/4596/1383/files/29927346624.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/casio_g_shock_watch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/58261008078.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/tekexapakeledegubudaguni.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/32726587962.pdf
    • https://cdn.shopify.com/s/files/1/0430/3277/2757/files/zetewufajif.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_off00004ed8.bin
bb64a75b876a3259dda18b62113d657da328f7b9084c41d6c2d5d904200b7351
pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED8 5064 bytes
font_01_sfnt_off00005ffc.bin
3829a94204269caf08e040ecf0c5a6481df43b59fc66c6e8ae676d958f456541
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFC 9508 bytes