Malicious PDF — malware analysis report

Static analysis result for SHA-256 b934491a56ca0c51…

MALICIOUS

PDF

53.7 KB Created: 2020-08-18 21:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb3e94a0695e07b724adb14f0536ef4f SHA-1: 4eb37c07464430531894779ad28c38d15ef2c8b9 SHA-256: b934491a56ca0c516e9f748129444e0ecd142a1f10df6277648c8c908c1c8d5f
154 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. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=destiny+2+forsaken+exotics+guide
    • http://files.lakemagdaleneacademy.com/uploads/1/3/2/7/132712530/0dc7c3f0e08b27.pdf
    • http://zuvitar.westpointballet.com/uploads/1/3/1/3/131379070/dedufan.pdf
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/cisco_cyber_ops_210_250.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/noramejixekaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9923/4203/files/10998823460.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/xewepafupidebefis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/befaladosomesojajuxokef.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/dental_assistant_resume_sample.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/21665136246.pdf
    • https://cdn.shopify.com/s/files/1/0436/2688/9378/files/modle_d_attestation_de_travail.pdf
    • https://cdn.shopify.com/s/files/1/0432/3626/2052/files/oxford_biology_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/git_update_from_master.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/c_linked_list_stl.pdf
    • https://cdn.shopify.com/s/files/1/0436/0421/3917/files/tic_tac_toe_python.pdf
    • https://cdn.shopify.com/s/files/1/0436/3255/8240/files/lodiremorotimisekakikirem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/85484013247.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/carla_thomas_baby_sheet_music.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_off00008e66.bin
5ece0e27288a4c2f5ea49ff7b63d764a911dfe713f247f4c75e4b6560109c239		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E66 5520 bytes
font_01_sfnt_off0000a14b.bin
c0ebd5c2b1ff396f0a826e18a637a67004af5d7aa6252c0a270942c584da726d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA14B 11420 bytes

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