Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cde91ae15e264c…

MALICIOUS

PDF

48.0 KB Created: 2020-08-14 06:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005ae32eaeff32a5acf1ce7100d32963 SHA-1: e51117d10c24ac21ad9251d97767a300a5572b4b SHA-256: 83cde91ae15e264c484fd9d18457846f4b3d4e1ffeb0eeb30fa2e36f741e4741
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.ru', suggest a redirection to potentially harmful content. The document body, though heavily obfuscated, contains references to the 'ttraff.ru' URL, reinforcing its role in the attack chain.

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.ru/pify?keyword=minimalist+blog+templates+blogspot
    • http://zuzuf.blainec2040.com/uploads/1/3/0/7/130739625/pawer_walevedekanifiw_lavopimoki.pdf
    • http://files.anythingispossible.co.uk/uploads/1/3/2/8/132814967/zoxotu.pdf
    • http://files.georgianbaybeauty.com/uploads/1/3/0/7/130775747/tomorefufogexuf.pdf
    • http://gokifura.elevatednaturalhealth.com/uploads/1/3/1/6/131606490/531275.pdf
    • https://cdn.shopify.com/s/files/1/0439/3215/6059/files/48407363456.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/98593688329.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/sazizulon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/makuwekijekagokedalanaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/lulokavevuvawow.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/1824414769.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/remitemogifurigabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/body_boss_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/basic_car_parts_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/27820928152.pdf
    • https://cdn.shopify.com/s/files/1/0429/9279/5801/files/16487306722.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/43675613882.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/xowirawaliwerokevizan.pdf
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/kyoukai_no_kanata_movie.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_off00007d42.bin
d01b649958805d33b5fc8796d09c24a09388096bf6cd4cb5170fedee5d6640d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D42 5188 bytes
font_01_sfnt_off00008ed3.bin
89dc33eab14d8c3bc81addb585c00e9c649ed6bb513a2250d87ca19d37933d65
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED3 10544 bytes