Malicious PDF — malware analysis report

Static analysis result for SHA-256 cffb47d22a90afda…

MALICIOUS

PDF

49.5 KB Created: 2020-07-29 12:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f7dd33b25acd6ebe540e6e66579490f SHA-1: d277bf3fd8564472703ac875a52df95dac269fc2 SHA-256: cffb47d22a90afdac82017e476d58f3d875e4815c43dbb085059d877e07b5921
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to 'Analg é{}sie p é{}ridurale pdf', suggesting a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=analg%25C3%25A9sie+p%25C3%25A9ridurale+pdf
    • http://files.lauren-williamson.com/uploads/1/3/1/3/131384113/rezaboxijujodo.pdf
    • http://files.taylormadebling.com/uploads/1/3/1/4/131437978/nurasiborurebanajupu.pdf
    • http://files.kimkirch.com/uploads/1/3/0/7/130775827/welobozutudirol-fulunim.pdf
    • http://files.drstevenjadlow.com/uploads/1/3/1/4/131437139/c75b9dbb.pdf
    • http://files.kimkirch.com/uploads/1/3/0/7/130775827/weloboz
    • https://cdn.shopify.com/s/files/1/0440/5913/2069/files/fudasitokumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12319118289.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/61740020770.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/99698016146.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/vituzeragojulovojemur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8614/2876/files/gomefubelegokubejeloborik.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/24842479902.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/83967438638.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1329/files/wisebiwanunowexakev.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/28816087325.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/59015993219.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/boresejerug.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3901/files/tenujorome.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/18861865766.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/7279847954.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f6a.bin
ceb12cb9428ca5821edae50f4ad147e232fdeefb4846b355792180661f4b41b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6A 5032 bytes
font_01_sfnt_off0000903d.bin
7c92b7decae582db862414b9d902c669799321dbb60d3c2816a74124513b178b
pdf-font-stream PDF embedded font (sfnt) at offset 0x903D 12064 bytes