Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6be32d9cac289c…

MALICIOUS

PDF

49.3 KB Created: 2020-08-23 16:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2004a2a41e2f66e54ab5db725d133509 SHA-1: 2de5b9b2ef716e6805374b692419b7a00c8b2194 SHA-256: bc6be32d9cac289cda5c0bf6138f610fb934187bbe1551cec4bb636f07963cd4
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common technique for delivering malicious payloads. The document body text, though partially corrupted, suggests a lure related to a 'strategic management report on McDonald's'. The presence of numerous external links, many pointing to Shopify domains, indicates a link farm designed to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=strategic+management+report+on+mcdonald%2527+s
    • http://files.wendyhorman.com/uploads/1/3/1/4/131406140/mipatiwotidasajutibi.pdf
    • http://files.crmag.com/uploads/1/3/0/8/130814124/tewifu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0398/files/.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/40885557091.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/17307054719.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/wujefolefajaligev.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/1422860437.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1861/files/fabovol.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/bruice_organic_chemistry_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/annual_credit_report_u._s._mail_request_form.pdf
    • https://cdn.shopify.com/s/files/1/0446/0321/1940/files/kenmore_elite_he3_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/2652276543.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/36055928674.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_off0000840b.bin
c725b60268dc74df9c0faf75ef41d3044fac72a7b6e7c40b6e424e84ed33630b
pdf-font-stream PDF embedded font (sfnt) at offset 0x840B 5532 bytes
font_01_sfnt_off000096b7.bin
8379b04809f76cf0c755e4237f4d6e2eaca11e8ed0b33a2ffd103bd5f550db46
pdf-font-stream PDF embedded font (sfnt) at offset 0x96B7 9916 bytes