Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa66c608b307cf4…

MALICIOUS

PDF

43.0 KB Created: 2020-08-14 18:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5971f47eca9cf026ec4ab325d81b28d4 SHA-1: 17f31ecc42801c3463c9698ca6de8fefff47092d SHA-256: ffa66c608b307cf44a87852336872d7414f0462a913401903e5d0b942263f26c
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malicious content. The document body, though heavily obfuscated, contains text related to a 'calculator app for mobile', suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning or distributing malicious files.

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=calculator+app++for+mobile
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdf
    • http://files.spiderbikemaps.com/uploads/1/3/2/6/132695455/8734099.pdf
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/83744417055.pdf
    • https://cdn.shopify.com/s/files/1/0443/4529/5004/files/66664044307.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/fuwotegebola.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0992/files/marvell_91xx_driver.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/bakejilimawob.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/95369802068.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/mixufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/76849885287.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_off000069ea.bin
3a1ea26249053419b8a168c55a50c7a52283633f942aacee176bd9471b4055bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EA 5028 bytes
font_01_sfnt_off00007aea.bin
bfbb33b04c1a5262d25001ae9b2f412a6a4c27c85cfa9d1cb569a672ecc95f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEA 10412 bytes

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