Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf94ced4494d387…

MALICIOUS

PDF

43.7 KB Created: 2020-08-11 17:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d6230445b7848bafe069a2948f5c999 SHA-1: a1b35e4e2c0cac3a95cf494615622b656671cf44 SHA-256: fbf94ced4494d387670798ad006613bf293de6a8a592f7d7f4d90840d9f5e2cc
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains hosting PDF files, a technique often used for SEO poisoning or link farming. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to drive traffic to this malicious site. No scripts were extracted from this sample.

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/wb?keyword=national%20geographic%20magazine%20november%202019%20pdf
    • http://files.upperwoodacademy.org/uploads/1/3/0/8/130874379/5508010.pdf
    • http://difenobu.wherechangeiscertain.org/uploads/1/3/0/7/130776407/5746772.pdf
    • http://ranapodes.loblollylabradors.com/uploads/1/3/1/1/131164250/5394324.pdf
    • http://files.salon-alphonse.com/uploads/1/3/1/4/131452902/50671.pdf
    • http://files.han1image.com/uploads/1/3/0/7/130776326/dabul_lezaxe_bedodadupa_vubevexujuzuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/95561037748.pdf
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/4696540620.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/budalujoporisutizagirome.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5351/files/zutalefisew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/45204995279.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/69196207905.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/46881822555.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/wafibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/3668254731.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/fantasia_models_mya.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/wugazajapelupejet.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/ripowelokegoredifetaliju.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_off00005a68.bin
8d5c32e9c78dbf94ec41617bcd3720eba5cf5a8c552e7bb4d82a99c67c751484
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A68 5880 bytes
font_01_sfnt_off00006e4c.bin
2173797ff401a1f19bb3b8694c9dc4b2ab39535bba477845b336b98f15c9ef89
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 10836 bytes
font_02_sfnt_off0000934f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x934F 4324 bytes