Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a2a80ab72140e3…

MALICIOUS

PDF

43.8 KB Created: 2020-09-21 19:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 001bfcce4d884a69b5865e5b82a65df0 SHA-1: 0783a165aa092c97cf097dfe3ef23e2925cd45d7 SHA-256: 92a2a80ab72140e309c48176c8b01d8fabae91438c799b8097cdc77cf98cf1ac
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of a link farm or SEO manipulation. One of the embedded URLs, https://ttraff.com/wb?keyword=omar%20hugh%20bayoumi, points to known malicious infrastructure. The document body contains metadata and a URL that mirrors the malicious link, suggesting a lure or content stuffing technique.

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/wb?keyword=omar%20hugh%20bayoumi
    • http://files.yungschinese.com/uploads/1/3/1/0/131070173/xebofimuzozoto.pdf
    • http://vafodi.clubhouseent.com/uploads/1/3/1/0/131071063/8645777.pdf
    • http://mojudu.grimousironblood.com/uploads/1/3/0/7/130776299/dawiritesas_medilubukiti_jizuve.pdf
    • http://files.janetandrews.co.nz/uploads/1/3/1/6/131636914/kexarataku-pojosavati.pdf
    • http://files.blessingbasketinternational.org/uploads/1/3/1/4/131454116/56e85.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/savigixotalivadatokinum.pdf
    • https://cdn.shopify.com/s/files/1/0439/8609/2190/files/conagra_foods_inc_annual_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/41564462126.pdf
    • https://cdn.shopify.com/s/files/1/0451/6190/6325/files/88969516730.pdf
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/guwifosuxiragudixapimakik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/happy_halloween_sign_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41697505155.pdf
    • https://cdn.shopify.com/s/files/1/0436/7056/9113/files/disulujiralavowixujazeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/welcome_to_mcdonalds_hand_game.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_off0000621e.bin
c228d9739973490c6f23076d5e9000875e06f03372fb9334a279678c22d10779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621E 5156 bytes
font_01_sfnt_off0000737c.bin
6551b1de18fdfd67b1c9179210f37899a6b585ff2a19ea9a991b95dc89886fbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 15140 bytes

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