Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f25d576d2f415e…

MALICIOUS

PDF

47.5 KB Created: 2020-08-04 10:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60558297666ff33671724097b65df6c5 SHA-1: da1121fb0d7dc3514331eeaf8e8d6fe409727389 SHA-256: 63f25d576d2f415e0edc3a57a03c51d536b52c06d48cb8a3e81ad1ea731b7894
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=andrographis+paniculata+chemical+constituents+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting an SEO poisoning or link farm tactic to drive traffic to malicious sites. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=andrographis+paniculata+chemical+constituents+pdf
    • http://files.wcmmea.com/uploads/1/3/1/4/131483097/9426160.pdf
    • http://files.dayspring7.com/uploads/1/3/1/4/131407089/5437789.pdf
    • http://files.donahuesportsmens.com/uploads/1/3/1/3/131398605/9835875.pdf
    • http://files.danworden.com/uploads/1/3/1/3/131384374/tonipebisenifus-bedozevabom-bugijidebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7964/7900/files/81697899104.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/14136850934.pdf
    • https://cdn.shopify.com/s/files/1/0434/4601/0022/files/50061581292.pdf
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/32065828454.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/74677887433.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/suxuvazamezufizi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/kazisidabitizifepidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegofegomena.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/jibogu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/73250188720.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/marovi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ab8.bin
226f5175a60b38f4aac566e377f9506890caa936351746d10dfba2ee33fd98db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB8 3744 bytes
font_01_sfnt_off00007802.bin
f2a15cac8b5ba355e48ef30570703b5dabe8b2a754ad0d0bc1b9f834045b3902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7802 5556 bytes
font_02_sfnt_off00008abf.bin
5b2980605ea3669e085218ee295652df20aa1aca99f4e04901166497f6f12428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABF 11024 bytes

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