Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dda52307b121dfc…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 09:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02bd1008f806cebb8f6493d790e27590 SHA-1: 552d911d66e1b077103a85845486febdbe9dbfce SHA-256: 3dda52307b121dfc5a579744ffbf63090d2601d27d768b368ebc1a79fdddc88e
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=peroxide+forming+chemicals+list, which is likely intended to lure the user to a malicious site. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt.

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/wix?keyword=peroxide+forming+chemicals+list
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/12422256272.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/pofadixaxalaroralanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/serip.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/meek_mills_chiraq_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/beginner_guide_to_stock_market.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/sarumifan.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/formacion_de_boca_hoy_vs_almagro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86593634255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/wudev.pdf
    • https://static.usrfiles.com/ugd/fe83c3_850c6bd1c2d749b698e88f3cacb91ec0.pdf
    • https://static.usrfiles.com/ugd/73c254_73ec5d8b13f14656bb13302401f98c59.pdf
    • https://static.usrfiles.com/ugd/b8c837_fba0567a109a46a6868974efd7aa2b5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_21299698ec9846c19e961adc3ac3e058.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7984/files/34099641173.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/23916190116.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/6805664862.pdf
    • https://cdn.shopify.com/s/files/1/0434/6026/4096/files/collateral_beauty_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/78278367821.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_off00006dbb.bin
ea417da3c91a4bae5fe7d4b29eea7f033de5cf016fa4056a4253228e4f0e4d6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBB 5504 bytes
font_01_sfnt_off00008047.bin
cc22737bf79c686ec1140ca275cd407c3e5fcf41208b6c64f4328e44a3ceb3b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8047 11680 bytes