Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40c6548888a23e8…

MALICIOUS

PDF

61.1 KB Created: 2020-08-30 12:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd77934d9e23f43e28b496522d5f5d28 SHA-1: c157b3967daf6c1992cc70a8cf5ad8a4754cec6c SHA-256: d40c6548888a23e8f6ea1b9db8ea6ea5929c91f5ee9da0de9e8454cc5423bc24
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.cc'. This URL is embedded within the document body, suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm likely used for SEO poisoning or to obscure the final malicious destination. The ML classifier also 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/wix?keyword=god+of+war+ghost+of+sparta+psp
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/google_forms_help_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6510/files/20817901431.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/zisonaloxixexujetufob.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/reduce_file_size_apple_mac.pdf
    • https://static.usrfiles.com/ugd/432b07_d04fe9c07ba343bfae05e726af4717b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1bf5fb15100465fa496c5dc6c6f9fcf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/rj45_ethernet_wiring_color_guides.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/78329187108.pdf
    • https://cdn.shopify.com/s/files/1/0441/2994/3704/files/98046267263.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/pedonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/jokanavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/english_tagalog_translator_free_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/tiwivawir.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_off0000b120.bin
c58ba4be4db630c4bbd4cab7cedfe6a1cb318e3794c1ab614f2bd28734ed699b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB120 5392 bytes
font_01_sfnt_off0000c393.bin
6799d42ca3b09d37fd99de9fe5c07f39fb2ff5f2581b5b388b94b9b05982c1ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xC393 10540 bytes