Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb697e82626f681…

MALICIOUS

PDF

41.2 KB Created: 2020-08-29 12:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b599ae5f3f64b72e4dffa114a1f44f0 SHA-1: 71791b283524867111e1efa1a76fc4b898113ec5 SHA-256: feb697e82626f681d3d71180e88569146ca96bb44bb3b08e4a5ed0562f76852e
152 Risk Score

Malware Insights

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

The PDF contains a link farm of multiple embedded URLs, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests an attempt to obscure the final malicious destination through a series of redirects or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=francis+chan+the+forgotten+god
    • https://static.u
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/resident_evil_5_walkthrough_gamefaqs.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/legelawetuloxidig.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/63653609479.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/3647256089.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/revivevu.pdf
    • https://static.usrfiles.com/ugd/b8c837_321509018dc64367ae7f55a15431404a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a12b8c2a6b14c78b162a8183953af0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e95c97eab8c4b959e761f0896d246b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f38d507272ba4bb5ac3f24534b1883b7.pdf
    • https://cdn.shopify.com/s/files/1/0436/7987/5225/files/axis_mutual_fund_kim_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/65496328326.pdf
    • https://cdn.shopify.com/s/files/1/0468/8681/3853/files/54284606584.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/88484990682.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_off00006359.bin
1efbc8c77377b792e42ad7aa5b06e22f15163572385ba0840028d9d48ca007d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 5208 bytes
font_01_sfnt_off000074fa.bin
b441dc4265a5ddd6243fb6c432bfebcba1592d5bc8f46b7ce82adc0e2b2be536
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FA 10120 bytes