Malicious PDF — malware analysis report

Static analysis result for SHA-256 522a45884d1a2e4b…

MALICIOUS

PDF

46.9 KB Created: 2020-08-05 07:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6457e488ddc98e44180a90b976d85271 SHA-1: feef22a3826093696d1a52f8c57c5ffdaa6e1a29 SHA-256: 522a45884d1a2e4bab7899c2df752f64dfc790ef8d1e9a8b7579436d9be8e897
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body also contains the same URL, presented as a lure for an 'IELTS academic practice test pdf with answers'. This indicates a phishing attempt designed to redirect users to malicious content. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm.

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/pify?keyword=ielts+academic+practice+test+pdf+with+answers
    • http://files.poolesvillepickers.com/uploads/1/3/1/6/131606289/fuminobixisetix.pdf
    • http://files.clclife.com/uploads/1/3/1/4/131408620/ribepodaduwif.pdf
    • http://files.strongerdaybyday.com/uploads/1/3/1/4/131483148/pujotogeg.pdf
    • http://files.maizewallin.com/uploads/1/3/1/4/131407424/xizaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/wamaxogovuwuzin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/21778949505.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6301/files/tuberculous_lymphadenitis.pdf
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/nofozelirorazixenipev.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/7023611569.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/79304811535.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8493/files/16784819266.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/govos.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/zewegunotas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34993807018.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/latisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8496/2200/files/57183091878.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4032/files/loxujas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c1e.bin
fda3c950ad62bde9aecbe0c41bbb355e9e15ae207bec4e1cb884b282138770f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 5104 bytes
font_01_sfnt_off00007d52.bin
a40b0102d55a29e703b5110610a2978e2ce4bcd50682c763e5018c23c8e313c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D52 10180 bytes
font_02_sfnt_off00009fe2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE2 4324 bytes