Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22da981e8d06b49…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 22:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87cc5e9267d44041752270f1b947cf76 SHA-1: 91b5a139c519652d35abceacb02cca597ff6a006 SHA-256: b22da981e8d06b49c97a425071d423d131188fbc7fa58e5b2bbe30117ea4f32b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used to create link farms for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=carry+synonym+formal'. While many other links point to benign Shopify domains, the presence of the malicious redirector is a strong indicator of malicious intent. No scripts were extracted from this sample.

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=carry+synonym+formal
    • https://static.usrfiles.com/ugd/3cb679_20edcb4b9a7d4b6a873509e3ec3c7a46.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_b1308e8efc5f48c0af58e9de594c1f17.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c92dc5782b14e0b80868bdc27535de6.pdf
    • https://cdn.shopify.com/s/files/1/0435/6230/3637/files/navisefixazuzoriwiwol.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/kajosumelaze.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/66810748262.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/apprendre_grammaire_franaise.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/97680223030.pdf
    • https://cdn.shopify.com/s/files/1/0431/1908/3677/files/fairclough_critical_discourse_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/1823199219.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/40049694477.pdf
    • https://cdn.shopify.com/s/files/1/0437/9954/3970/files/hand_embroidered_bed_sheets_in_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/convert_file_to_microsoft_word_document.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_off000065c9.bin
ce9899ad66913afe180fe0faf0f7ec0656aae77f946e347148d09f7dff537bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 4920 bytes
font_01_sfnt_off00007676.bin
91b29e4d84d17e4872b10c672265a6d49f7cf6a46eb3f4ba49547ec6eb29d0cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 10120 bytes

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