Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b01f657219f585…

MALICIOUS

PDF

38.4 KB Created: 2020-08-19 07:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ec17945697d86abdd94d0e4d48d0632 SHA-1: 07049abde0a0ea29c653ba4da091a12b5c289aef SHA-256: e7b01f657219f58553bf7d8bfd8a3e930d49344fe4d2553538a83d48a25a889f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is further obfuscated within the document body, alongside a keyword suggesting a lure for 'App store mac os'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.ru/pify?keyword=app+store++mac+os
    • http://files.siamdetectors.com/uploads/1/3/2/8/132815002/rupotirax.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/ffxiv_the_time_between_the_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/voltage_divider_bias.pdf
    • https://cdn.shopify.com/s/files/1/0437/0438/5690/files/5444223028.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/lezobipivuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/zosisatepitakuwel.pdf
    • https://cdn.shopify.com/s/files/1/0444/3268/7271/files/e_coli_biochemical_test.pdf
    • https://cdn.shopify.com/s/files/1/0451/5568/0410/files/ahlam_mosteghanemi_livres_en_franais.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2438/files/anemias_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/ketonet.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_off000059b9.bin
11607e2755b2285ae4063db5ed7550d424474626144f8f92ba13ade2a7346672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B9 5036 bytes
font_01_sfnt_off00006ab8.bin
4ceab7cb0e0039729cd0bbedf028e12b7d84b72d0ad302386b39f27124486478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB8 10100 bytes

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