Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c6d13cc285099f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 10:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a2b0a27ab852026b398703c38fa559d SHA-1: 8cce938a22709c99e92179280e39ae4ec4b057c2 SHA-256: 28c6d13cc285099f3e9fd4631a120f9540726241e5fe95f061a2642a5ba59b84
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=malta+time+out+guide'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains the malicious URL and appears to be a lure disguised as a guide.

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.com/pify?keyword=malta+time+out+guide
    • http://files.snovalinc.com/uploads/1/3/1/3/131380889/7866632.pdf
    • http://files.ratchfordrealestate.ca/uploads/1/3/1/4/131437515/pimakipisezamamixin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/ct_bng_foxit_reader.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8501/files/mesolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/17904317167.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/company_income_tax_return_form_2017.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/pefajeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/63165124251.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/male_indian_names.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/fundamental_accounting_principles_23rd.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/5256952729.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_off0000642d.bin
2fbdf535c333d8b40a03bc0604c7f19ee9fc45a7842892b8803c76daa240b73a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 4876 bytes
font_01_sfnt_off000074b7.bin
3436bd36825721857b868b5b9308c8195cbf4bb11f43dbbda83ef149475f806a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B7 10612 bytes

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