Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8e9853cb139a43…

MALICIOUS

PDF

43.5 KB Created: 2020-07-28 15:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df538a5e9e540dfe904b9182b301ba6b SHA-1: 013eacf6b3b13c5816b8a63ede0b762ee9b19269 SHA-256: ee8e9853cb139a4387232d55e6e8dd0505d81ac3a13ea5a3fb3f07d8a99153ae
130 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to a known malicious redirector. Additionally, it features a large number of external PDF links, suggesting a link farm for SEO manipulation or traffic redirection. The presence of a 'download button' lure further supports the malicious intent. The primary IOC is the malicious redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=opera+browser+free++for+macbook+pro
    • http://files.haidagwaiimagazine.com/uploads/1/3/2/6/132680853/2099364.pdf
    • http://files.equineecogreenus.com/uploads/1/3/1/8/131856860/4888660.pdf
    • http://files.9thwave.net/uploads/1/3/1/3/131378936/84970cbe.pdf
    • http://files.preparetoperform.net/uploads/1/3/0/7/130776562/ed1fefb5ae562.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/nelalexelugodozobimiwujin.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/funisubirudolukeruninuzes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/47766854013.pdf
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/10676933836.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/3716935610.pdf
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/29819237669.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/vinepuvozepurixuvuxuvibuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/zalovosurawexinugezanir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/xitix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mituvazejuremoposanizama.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/68299056184.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/
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c6e.bin
9e740f4da75576f0fb75a213d25bc05b83c7b7bcb93bca381d25d8c2781c67bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6E 5004 bytes
font_01_sfnt_off00007d79.bin
3d5bd946c26d483b5810d1b165b9fe95b0db9f574568cdbb66b8634010b4fba8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D79 10420 bytes