Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63a11e36e3d93b4…

MALICIOUS

PDF

35.7 KB Created: 2020-08-19 04:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c21a3d02342de849ea85ea72bad6dd25 SHA-1: acc070db111eb7bcf09d908d511e224896b342b1 SHA-256: f63a11e36e3d93b475df2e727b9a0ea79d83518556942d223984db3b75d20317
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=champagne+and+sunshine+ellusive+remix'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF filenames, suggesting a lure to disguise the malicious intent.

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=champagne+and+sunshine+ellusive+remix
    • http://mumanape.diamond-equine.com/uploads/1/3/1/8/131872295/xofuwito-timuni-nesaribe-vidodefazemi.pdf
    • http://files.kalinkikreations.com/uploads/1/3/0/8/130813582/mefakizadu-zizerog-nutavogeweb-lidemabi.pdf
    • http://files.yogadiversityinitiative.org/uploads/1/3/2/7/132712282/mivilawowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/john_deere_7000_planter_settings.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/behavioral_approach_to_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/zudigiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/1229/8648/files/xefipuniz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bugos.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/arithmetic_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7308/4319/files/neopixel_ring_code.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/personal_history_statement.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/jurizodivuwexusiwekumuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/7241/3079/files/zixefagopemuzidizuzotove.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/39380219250.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/vijibejipigefaxozijujupap.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_off00004a50.bin
6d1c3fafaddf63030cd4232614a875c2e01fbd796e79fa6b975201af4f2fa518
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A50 5408 bytes
font_01_sfnt_off00005c95.bin
d0fd9f84be1b05054752dae219fdb6094523a3c9a9cdfb0fcef35725853c84ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C95 12188 bytes