Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a91828d748d8e57…

MALICIOUS

PDF

45.3 KB Created: 2020-08-19 00:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 932af427e684b1c26ced579cb8db388e SHA-1: 0d8716b2d854a6efec19ea046ac3d9757f8cefe8 SHA-256: 8a91828d748d8e57e93843cf37e2455c6e5a86663cc6c3b6d4c6c5bde9aec9b8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=gigabyte+aorus+pro+wifi+b450+manual', is designed to redirect users to potentially harmful content. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, many hosted on Shopify. The primary intent appears to be social engineering through a lure related to computer hardware manuals, directing users to malicious infrastructure.

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.cc/pify?keyword=gigabyte+aorus+pro+wifi+b450+manual
    • http://files.alexlanshe.com/uploads/1/3/1/6/131606346/15b734c05031c.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/kipatevomux.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/55525661540.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2421/files/votajojaviponezibarolowi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7913/1551/files/xivotifusebisigejakire.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/rukulubawipiwelobewutazu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/52038102934.pdf
    • https://cdn.shopify.com/s/files/1/0436/6109/9161/files/filmywap_2018_punjabi_movies_qismat.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/vexofidobeporenafaseporo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4733/5574/files/62956849161.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/lagafajaniporokutavukebes.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_off00006678.bin
bfdc081ef08a8a89e93f8ef443ac33fa667075d38e60ac25fc34ea915088546a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6678 5940 bytes
font_01_sfnt_off00007ac8.bin
964534ca35f29cd92da7c23b96af7893d0b6dd04757093ef3ada8205034b6b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC8 14764 bytes

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