Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf3d06870f8fdfb…

MALICIOUS

PDF

40.9 KB Created: 2020-08-24 00:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13e874f9fb8e408f6f687160595be1fe SHA-1: 73521f89a6dea21fcecdeb18984848f9d5f6ebc6 SHA-256: 5bf3d06870f8fdfb667fd1158c7f7181236635e504675bf4a153908bd4caf9bd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO manipulation tactic. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document might also try to trick users into installing remote support tools, but the primary observed behavior is redirection to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=android+tablet+apps+free
    • http://files.cosmicbrushes.com/uploads/1/3/1/8/131858287/rofaxad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/84900737510.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/50390501423.pdf
    • https://cdn.shopify.com/s/files/1/0430/2058/3065/files/11233821363.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/nofepeganexura.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/arduino_pulse_width_modulation.pdf
    • https://cdn.shopify.com/s/files/1/0448/4795/6130/files/python_multivariate_normal_distribution.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/7810160699.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/tejozuguruwavamaxus.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/bare_metal_os.pdf
    • https://cdn.shopify.com/s/files/1/0438/8408/5416/files/americanah_analysis.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632a.bin
4ab32833ceceff445a55d6394ae4cb3eda6eafc440defe2d9d719137ef7315de
pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 5164 bytes
font_01_sfnt_off000074bf.bin
7a846bb3d5cb30d77834534dca62cad415e82f41f2c82a054a1f37bf2c793dc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x74BF 10048 bytes