Malicious PDF — malware analysis report

Static analysis result for SHA-256 44426bff814c2660…

MALICIOUS

PDF

39.3 KB Created: 2020-08-21 05:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b832fbddb828aa7d29bbbbdfbaa94202 SHA-1: 009942700e04f955e3072482e43e7536ad77da0a SHA-256: 44426bff814c26604edc4b48a5bb6f36ae1514a7501454a79af570981acf4eb1
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as legitimate documents. One of these links, https://ttraff.com/pify?keyword=employment+hero+app, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and the employment lure. This suggests the PDF is part of a link farm or SEO poisoning campaign to drive traffic to malicious sites.

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/pify?keyword=employment+hero+app
    • http://files.porvenirmassacre.org/uploads/1/3/1/8/131871568/81ab386b0422.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/xerogifidebibunasi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/rerixuxoxoxezasowor.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/65625986121.pdf
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/suwavimefip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/noaa_weather_stevens_pass.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2184/files/toshiba_television_remote_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/division_del_abdomen_en_9_cuadrantes.pdf
    • https://cdn.shopify.com/s/files/1/0438/6747/2037/files/jawetobijozegikeparisuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/7538524176.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/nedaximiritejunal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/towujurumuxokez.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/vupefikidafatujif.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_off00005d4e.bin
b3ef577397bdbbe16f1fb40796eb7401298de6681f804ff9f3cde4b7be0b7aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4E 4940 bytes
font_01_sfnt_off00006dec.bin
659eb0321076d4ed403ef46ba040afec67f27d7c74c1d32f2523c9fb0dbec68a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 10204 bytes

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