Malicious PDF — malware analysis report

Static analysis result for SHA-256 f956e45db778831f…

MALICIOUS

PDF

39.4 KB Created: 2020-08-30 21:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7445883a684239a77ab3e9d9b78f3e7 SHA-1: 1123081437ae69b444b079a3b920bd27f4e01cf5 SHA-256: f956e45db778831f02485bff094545365a1b6c19d945a189fa45a8e256367ff6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure for a 'free PDF'. The PDF also contains a mass external PDF link farm, with many links pointing to Shopify domains, likely to improve SEO for malicious content. The primary malicious URL is https://ttraff.com/wix?keyword=guia+santillana+5+grado+pdf+gratis.

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=guia+santillana+5+grado+pdf+gratis
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/tuzapogujuvunu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/br_ambedkar_books_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9757/0980/files/55291398739.pdf
    • https://cdn.shopify.com/s/files/1/0431/5024/6048/files/sifizataduga.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa498cbccd3f411cb42edd933d93e5fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9fe2f5800e94b7dbf78fdecd968d284.pdf
    • https://static.usrfiles.com/ugd/191a6d_1e6c76e7957343668dc13da5fb2c14c4.pdf
    • https://static.usrfiles.com/ugd/a86d68_8cd45df800a44e77959deec767b9182d.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/35077585529.pdf
    • https://cdn.shopify.com/s/files/1/0434/2877/4044/files/usb_bootable_linux_mint.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/pirotelaxalawawifigak.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/tchibo_cafissimo_classic_bedienungsanleitung.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/2002_yamaha_v_star_650.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c30be4bc93049b48aca438e8d593c9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc707d8188394feda3da4bf5721843b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f81cc0d72986438190d1c685ee02e642.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_off00005908.bin
1b6bc7c34f8b7b124c4bcae5be947508896fa66ef5d10035ccbeb8aabd5d6e92
pdf-font-stream PDF embedded font (sfnt) at offset 0x5908 5364 bytes
font_01_sfnt_off00006b5c.bin
3d3f087ed929780318edd547c72028edb96736f5908011e9c3293e2bdd3bdc1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5C 10960 bytes