Malicious PDF — malware analysis report

Static analysis result for SHA-256 2146e595e573e4d4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 12:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa9d6d0438bd66e62c4b3cf64f1cc42d SHA-1: e1cca29210f115b22b28d6206c87b8fbe4e99206 SHA-256: 2146e595e573e4d47fe98ba9206fb5a4fee16e826c2a4c3fb05ee311ca998db5
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at `https://ttraff.cc/wix?keyword=lcpdfr+call+tow+truck`. The document body, though heavily obfuscated, appears to contain references to this URL and other PDF links, suggesting a lure to external content. The ML classifier strongly supports the malicious nature of this PDF.

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=lcpdfr+call+tow+truck
    • https://static.usrfiles.com/ugd/bd5c68_f6b34cfb5abf4dcfb67d438fdc8be78f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b1e24127d5c4175b889c175a960c520.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c437f55576b48c3898710e97ac89d5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_428cec0b543d4fd7a34cd88414831e33.pdf
    • https://cdn.shopify.com/s/files/1/0436/5176/0281/files/94475567532.pdf
    • https://cdn.shopify.com/s/files/1/0432/4851/7275/files/op_sword_command.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/imperative_sentence_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/buwutonaziditozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/24303850882.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/80115504137.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/firefly_episode_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7844/files/degabiwewoboxofejemiw.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_off00005a13.bin
790753b99d221e1e43fdf14f2a2294365f7560d767b08e62ebdd615b2af7ee9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A13 5068 bytes
font_01_sfnt_off00006b76.bin
630b06df772e816f9abb349ebe65a84903ec0cab088f2a644bf1174bc422d06a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B76 14920 bytes

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