Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbbc3608f2aec73…

MALICIOUS

PDF

59.2 KB Created: 2020-09-03 07:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 084a5c18f89374177948ac56b0c35e7d SHA-1: c2303d76724f3378c65cabb07eda2bfe4033d37e SHA-256: 9dbbc3608f2aec732bd7564cc383696dd02e59c07ade1836e73e776d4db2fcf1
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club', which is also present in the document body. This indicates a phishing or scam attempt to redirect the user to a malicious site. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. 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.club/wix?keyword=free+online+daily+bible+study+guide
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/wazolefuwejegoguzefo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6929/2188/files/beats_x_earphones_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/78936415574.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/wanegoxifimagidobomudas.pdf
    • https://cdn.shopify.com/s/files/1/0436/5660/9957/files/jedalolanidikopemape.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/kefesedifosubapi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/kabevafej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/suzitirapigolidevesisiwu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4831/0683/files/catalogo_jequiti_03_2020.pdf
    • https://static.usrfiles.com/ugd/4aae87_8d8b9e466ee24fba8b1e3b3cd3dfeaab.pdf
    • https://static.usrfiles.com/ugd/64f9d2_b09a4d252ac84be79876eee2ec9dd01c.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_off0000ac4b.bin
6d52ca720163a2a2a368f64e415376a740b2c9ec4448863c523aab045aa65f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4B 5192 bytes
font_01_sfnt_off0000be04.bin
68079875fc4f30152a2432f316c75fa398468a87a8647300a10441340845c23e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE04 9920 bytes

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