Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbf5af9dc1c9b18…

MALICIOUS

PDF

45.1 KB Created: 2020-08-21 15:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05bc752d76ca7e567bfc0c9fecbd2d08 SHA-1: 706dfac622778a2f88c038c897d8c302d835847d SHA-256: 6bbf5af9dc1c9b181627df8761b09397bceabe3fd0ade76689f283c73b155e86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to an English to Russian dictionary and the malicious URL, suggesting a lure. The presence of embedded links and the heuristic firing for 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=english+to+russian+dictionary+free
    • http://senolina.newcanaanpizzaandtaqueria.com/uploads/1/3/1/1/131164250/malapilusekobok-wumalotave.pdf
    • http://files.tinablanck.com/uploads/1/3/0/7/130739744/luvebututipe-nokulemeku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/79408500796.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/luzamoxalikiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/ameba_pico_font.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/detakeni.pdf
    • https://cdn.shopify.com/s/files/1/0449/0890/4603/files/fashion_brand_identity_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/pipukipubunodariz.pdf
    • https://cdn.shopify.com/s/files/1/0444/3917/5335/files/kewuvixuwasitoga.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6102/files/81617964387.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8919/files/27535233155.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/1161892356.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/rabobojofirujuvikazijab.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d16.bin
ce140b4d88cf1c1aafcb085c9da032f0b57d05f168800e86f6c89a0346ed0d09
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 5344 bytes
font_01_sfnt_off00007f40.bin
b3b0698c4fe15fe22697e402f900df8d1b35d738c818dc0c7cc1e9fc1be505aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F40 12396 bytes