Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2088b9cfc9cd98c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-02 03:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8184e5831dd5478adb7fc041c5a1a81 SHA-1: d8a13f8e6cffb9191bb641c2446ab1ed2bcc370e SHA-256: c2088b9cfc9cd98c4464fa9305f9f0bf828c4ca33052c690361a9ff5b1245bb8
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains the string 'Realtek network drivers windows 10', suggesting a lure to trick users into downloading malicious software. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful infrastructure.

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.com/pify?keyword=realtek+network+drivers+windows+10
    • http://files.asbraveaslandon.com/uploads/1/3/1/4/131406068/e2a94d86f61e.pdf
    • http://files.virtualchip.com/uploads/1/3/0/7/130775677/7471301.pdf
    • http://files.circleofloveceremonies.com/uploads/1/3/1/4/131406806/8665771.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/pilizek.pdf
    • https://cdn.shopify.com/s/files/1/0436/2610/2947/files/lisibiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/24254703408.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/59439701177.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/95290717087.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/loxego.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/fuzatagaweselizuwanupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0577/files/65240925818.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/lofabigu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.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_off00005f01.bin
8f4f27e668826c82f8ccd5df260005dafe4591e3f4850c71b51d74a9384bcdb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 5236 bytes
font_01_sfnt_off000070fe.bin
7cf7bf94dcd55f5d3abd8ab98c31c0de57ae45e8aae9f27d62bdfb7dba2915d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x70FE 13956 bytes