Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fa9567db3ab0f2…

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 12:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a89ea8d65be9a9edbda529f9769126a SHA-1: 13276ce56b5853df11f64b9ed7a79393b55638a8 SHA-256: e7fa9567db3ab0f2a783d995b5fe340eeb96955b484bb567c27c61a711eb34d1
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL points to a known malicious redirector, and the document body contains numerous links, many hosted on Shopify, likely as part of a SEO-based lure to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=advanced+integrated+manual+physical+therapy
    • https://cdn.shopify.com/s/files/1/0461/7640/3609/files/difobeba.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/fundamentals_of_algorithmics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/food_in_ancient_egypt.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5547/files/71553922900.pdf
    • https://cdn.shopify.com/s/files/1/0453/3600/2715/files/critical_care_nursing_diagnosis_and_management_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/visatonilotaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/4643101195.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2325/files/sales_incentive_plans.pdf
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/duweloxuwusaterotilibo.pdf
    • https://static.usrfiles.com/ugd/b8c837_051ad0a2673f4287b6d7440a6db212f2.pdf
    • https://static.usrfiles.com/ugd/8127dd_0317206f87654b6aa980796fbd1c1f13.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a52afa8c6864c83950bca15c2dd21f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_036edfe4fecf43169e19388be727cec1.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/magibenabisex.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/multiplication_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/konukugafuxawaduremepu.pdf
    • https://cdn.shopify.com/s/files/1/0449/0684/0231/files/40845014248.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/92536043369.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_off0000799b.bin
48d1058d4e8cd1d5b8b4a0b8a7e9e9d8d907c6a0b0ef833773dcc636f83a2480
pdf-font-stream PDF embedded font (sfnt) at offset 0x799B 5640 bytes
font_01_sfnt_off00008ca6.bin
b26aee0e9018fea4a16bf97a6a55d130761d8be75ebb268d4f941269ad56fd45
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA6 10220 bytes