Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7a26cbb90a4fbe…

MALICIOUS

PDF

86.2 KB Created: 2020-08-19 10:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025e261bc7d7e6eeca511d1ab958cf37 SHA-1: 98286f21d40c2687dc08f6001d838201b2dbf178 SHA-256: 1a7a26cbb90a4fbecd47cbd079271e3bab61dc7b7342cec682029eeb171951c7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, a technique often used for SEO poisoning or to obscure malicious links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the redirection to malicious infrastructure.

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.cc/pify?keyword=sound+of+angry+birds+app
    • http://gufoguruj.falconandhawke.com/uploads/1/3/2/6/132696048/mubemofifa-polere.pdf
    • http://files.texasgulfrecord.org/uploads/1/3/1/6/131636941/72c12e77117976.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/gambar_animasi_lucu_kartun.pdf
    • https://cdn.shopify.com/s/files/1/0440/5621/5702/files/9261708132.pdf
    • https://cdn.shopify.com/s/files/1/0438/7959/6187/files/cordon_umbilical_corto.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/57135175770.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/83325647019.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/8070045681.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7456/files/8637268052.pdf
    • https://cdn.shopify.com/s/files/1/0440/8462/5558/files/affidavit_of_loss_id_sample.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/admission_enquiry_form_in_html.pdf
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/41947733590.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/girosolosisowufob.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/tikirililawase.pdf
    • https://cdn.shopify.com/s/files/1/0435/6741/5457/files/pdf_agama_hindu_kelas_11.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_off000112b3.bin
54300b4d869ec8b93dcf68e5e5f1570e927de10f55b100f94cfda2ec35652687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112B3 5520 bytes
font_01_sfnt_off00012586.bin
7e0ac8b7e30990490681d3849181126f69a1fee1c060ecc1635a04fd1379c60c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12586 11380 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.