Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bcd6907f3f0f11c…

MALICIOUS

PDF

38.0 KB Created: 2020-08-18 12:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cc5c0beca6798a0dd0934a988fd584b SHA-1: b299e69f0805e4f41b51d60b603dc76f4d35d631 SHA-256: 8bcd6907f3f0f11c46fd7c4c5d925f320484540bc06aeb3269c69601d52b945d
120 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, specifically pointing to 'https://ttraff.com/pify?keyword=chromium+os++iso'. This indicates an attempt to lure the user to a malicious site, likely for phishing or malware distribution. The document also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a PDF link farm. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=chromium+os++iso
    • http://files.muddybootsfarm.com.au/uploads/1/3/1/0/131070651/kawixoxoxiponulomu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/bloomsday_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/atmospheric_science_an_introductory_survey_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/17221686359.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/jijolovuzizemabuxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/ayurveda_books_in_telugu_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/bumuruvezofibewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/pekatexokusibedinalila.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/singapore_maths_problem_solving.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/60370427481.pdf
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/rarafanojulozikovoxunosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/collateral_beauty_book.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_off000059ba.bin
ff2d3c1f5617221b6d688ab83d622e385880d6f46e5e6f39a4927f96e5795334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BA 4588 bytes
font_01_sfnt_off00006929.bin
13bd2e9524b3e4aa368eea7093559c3132baa92bc2545294a84c576870e73329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 10144 bytes

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