Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d5b0a95fb8131c…

MALICIOUS

PDF

47.9 KB Created: 2020-08-15 03:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eafe7d814b0bce43077737f33149b37 SHA-1: d9157aa4222ca9a11f152b173640efbca3e1a669 SHA-256: b8d5b0a95fb8131c81ca8a0dff58999fb04ab41d10408e4f603cb9f36cd637e0
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a phishing or malware distribution site. The document body contains text that mimics a report title, 'Medscape compensation report 2010', likely as a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link within the PDF.

Heuristics 3

  • 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.
  • 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=medscape+compensation+report+2010
    • http://files.graceub.com/uploads/1/3/2/6/132681404/6733747.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/44178516895.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/jupujifunusogetujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/unity_write_to_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/vusikinogepis.pdf
    • https://cdn.shopify.com/s/files/1/0437/9338/3585/files/kenoxovavizevapujeliwuwe.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/69476865429.pdf
    • https://cdn.shopify.com/s/files/1/0430/3319/8745/files/fekukavijozagivoxit.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/30903203177.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/nih_guidelines_for_weight_loss_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0435/0358/3384/files/64371721332.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/42703242295.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/26963500207.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/vukanezanizevex.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_off00007a75.bin
506f6157c29f13c54959bbc4b3cb0d029efa9f736871d20d0f26c45898de7566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 5520 bytes
font_01_sfnt_off00008d2b.bin
ac5a471df1a2d4c35e14ac3a2fd386a504ff8d0a0515f9b7bb6a1f82ab4ba374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2B 11152 bytes

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