Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7add1afd5c139b…

MALICIOUS

PDF

46.7 KB Created: 2020-07-31 17:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 931c5a789441f91ac52d7a397819c956 SHA-1: 1c6f3191f44a1c55fe52cae1fb874c3572ff8cdb SHA-256: 2e7add1afd5c139ba9c421cec7e4ff011eb7bf4ee2a5721b94dbfb887eac54d0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. This URL is presented to the user, likely as part of a lure to redirect them to malicious content. The document body contains obfuscated text and a URL that appears to be part of the redirection chain. The presence of numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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/pify?keyword=minecraft+piggy+songs
    • http://files.forestgroveelementary.ca/uploads/1/3/0/8/130813998/6031947.pdf
    • http://files.thecottageschool.info/uploads/1/3/0/8/130814245/nujuvuvuruzadubufit.pdf
    • http://files.emilyeatkinson.net/uploads/1/3/0/7/130739525/lodejowo-mabofojofopim-mukorureri.pdf
    • http://files.luminous-studios.us/uploads/1/3/0/8/130873880/2486059.pdf
    • http://files.margoselski.com/uploads/1/3/1/3/131379396/4873835.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/23864360609.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42820491308.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/wizamikulefedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/zufisapulexopevuzu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/dapuzagopifixotefiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/69636403402.pdf
    • https://cdn.shopify.com/s/files/1/0434/7599/2728/files/48096443457.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/19326716116.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/wizakemokikaseni.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/46006914267.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/84700432679.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_off000077ab.bin
9b549e7506d8b87db7bde4e7dbeaabf41f5891c41e5bb50defe3149f126b9522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 5260 bytes
font_01_sfnt_off000089b6.bin
84f55dc410d04f0db951e64bb793e0e61f3f530f22e4d91c79a5e5ffcbe98cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B6 10544 bytes

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