Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76b428cf5b7ad55…

MALICIOUS

PDF

41.4 KB Created: 2020-07-31 21:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76c99366a7423d48eeecdd2534598d67 SHA-1: 0889f5df55eaa5b3120c5421ac7a7962566d0603 SHA-256: c76b428cf5b7ad550df784d96a963342fe225c0b99b96bc7732988d9aa7931bd
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

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=snow+on+tha+bluff+torrent
    • http://files.ildiamon.com/uploads/1/3/1/6/131606111/a90c50c.pdf
    • http://files.driversedgrades.com/uploads/1/3/2/6/132696267/suxaki.pdf
    • http://files.pamserrawenz.com/uploads/1/3/1/4/131437285/doroxi_joxixuluj_tutifubezej_jetozopididom.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/zasevajirakumafevosik.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/42567022235.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/nanukosidisaze.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/fuxanibibakakawakeruk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/famob.pdf
    • https://cdn.shopify.com/s/files/1/0437/3331/9831/files/kabusevedifodimedir.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/blockchain_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/15471250552.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/73963721440.pdf
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/jomositudab.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/44397827753.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/xulanabigizujejasoreb.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_off0000657d.bin
d60bb0b4e26c04e0a1abf70df6dad802a87f6519a3563cdafc0e8e81cb6c1d9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 5012 bytes
font_01_sfnt_off0000769b.bin
3dab7e807628736a2592918f697443b9e107fdcb2b397dfebd9edb549691558c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 10264 bytes

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