Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd18bebeb354357…

MALICIOUS

PDF

42.1 KB Created: 2020-08-15 14:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb9396bdd400342128dca0349ee2cf23 SHA-1: 8a92bf0c9d9ab2de45ff45c569d923c56dd1796f SHA-256: 6fd18bebeb354357277cbc7648a22315e6691ae9593b0ec6ea9466abd1434b92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO spamming technique. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The presence of embedded links and the ML classifier's high confidence score indicate malicious intent.

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=video+slideshow+template+after+effects+free
    • http://mowigowo.patchsprint.com/uploads/1/3/0/7/130775403/titedobizoz_bimaxufeluba_wezubasek.pdf
    • http://files.santiagohernandezteacher.com/uploads/1/3/1/4/131483281/1c3bb97fc.pdf
    • http://files.carolinacavaliers.com/uploads/1/3/1/3/131398134/wiwusepitenunatirebe.pdf
    • http://files.millermiller.info/uploads/1/3/0/8/130813796/bibumilowotaxup_pixepezozefe_sifane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2324/3176/files/gamebafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/89645932942.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6207/files/winin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/weekly_tax_table_1_july_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/lopujafinosog.pdf
    • https://cdn.shopify.com/s/files/1/0449/1191/9271/files/nofin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/xidolozojodibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/case_files_family_medicine_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/zokabetufafagelimogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7563/files/tafsir_al_quran_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/mimupiwipivoxave.pdf
    • https://cdn.shopify.com/s/files/1/0450/8627/7784/files/38866431652.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_off000065b2.bin
a76f8b70ca305a0cb52e525ee3df4336382d1a34d77bac31e45f5d2bbb7d7fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B2 5452 bytes
font_01_sfnt_off0000782b.bin
b98e3ac61d1fac65ad78440f11158f6b038b93a9c4da598e7417acf87be8e5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782B 10280 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.