Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f9f0a41b76b524…

MALICIOUS

PDF

37.1 KB Created: 2020-08-16 12:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67020bec31758aff0c3216b6348b6149 SHA-1: da2c28fa86455e6911d1172156f03f16038cf3cd SHA-256: f5f9f0a41b76b524986f714647f3673684efd32f2ee8ee3babf51dc96c04eeff
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one directing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=comparative+and+superlative+worksheets+with+pictures+pdf'. This URL is designed to obscure the ultimate destination and likely serves as a lure to download further malicious content. The document body, though heavily obfuscated, contains references to the same malicious URL and other benign-looking PDF links, suggesting a link farm or SEO poisoning tactic to attract victims.

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.ru/pify?keyword=comparative+and+superlative+worksheets+with+pictures+pdf
    • http://files.addingtonforge.com/uploads/1/3/0/7/130775537/4672366.pdf
    • http://files.mrsteadman.com/uploads/1/3/2/7/132741535/pikosusuro_ruzovuserepafa.pdf
    • http://files.withlovezoerose.com/uploads/1/3/1/4/131452878/d84604294c7cc.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/64834275767.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/81513664562.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/88617294922.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/bifunonimusuvuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/xowedisidapigelifibe.pdf
    • https://cdn.shopify.com/s/files/1/0448/3337/4369/files/biology_notes_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/75478456004.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/96463891449.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/23342005412.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/que_es_codominancia_genetica.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/geravevoborawelofukeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/bobemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1484/8671/files/cerwin_vega_vpas10_manual.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_off000051d9.bin
a85baaa2b057a635e6842d9045ff07a95b7c432dc4192b02a31928a687641ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D9 5516 bytes
font_01_sfnt_off00006480.bin
0bd10871ac236e83f62ea5e125a74c20a5ed10ba08c7f42687d50710a89c4d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 10012 bytes

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