Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0507e4ababc131b…

MALICIOUS

PDF

43.8 KB Created: 2020-08-30 22:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aecaddcfa4aec1cdab653293062a36e7 SHA-1: e0f0475677b42978e686a24d95334a04204e505a SHA-256: b0507e4ababc131be6a66d170a7eb9655e7430a3fe75ca4045ad32c507ffdd84
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, however, redirects to a known malicious domain (ttraff.cc), suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, framed as a "scientific graphing worksheet".

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=scientific+graphing+worksheet
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/86610289228.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/99059379555.pdf
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/kyoto_temple_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/dogitaletazidosuwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/vegoxafotipot.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/45091142510.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/dikuruwusuxigabosapok.pdf
    • https://cdn.shopify.com/s/files/1/0433/2417/8600/files/tulujonixuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/86130170336.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/8297393561.pdf
    • https://cdn.shopify.com/s/files/1/0434/3119/8886/files/pasunimavigeneluzafava.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5861/files/voxozigazerimipiwes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/71511929362.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/how_to_delete_all_your_tweets.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/che_guevara_biography_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/vs_code_format_json_without_saving_file.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_off00006bd2.bin
f6ca62d807d9e4dbb034a6d50f717de603bc4d3f6803fb4645e20b4bedd10f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD2 5504 bytes
font_01_sfnt_off00007e92.bin
d067617011c02cec00364357d82f61ebe6f040236393225b4761ae4d65b42617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E92 10472 bytes

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