Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50c7494923eb4db…

MALICIOUS

PDF

37.1 KB Created: 2020-08-24 06:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 589224524dc58a3cd47dfd8f54b0eb12 SHA-1: ab22139284788e07433be8e75ed173a9bd98a64c SHA-256: c50c7494923eb4db596576fabe77ffb6cf8b1d837aadd603b976237a427c3eeb
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 links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=avoir+conjugation+worksheet+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'avoir conjugation worksheet pdf', suggesting a lure to trick users into clicking the malicious link. The presence of numerous links and the malicious redirector indicate a link farm or phishing attempt.

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/pify?keyword=avoir+conjugation+worksheet+pdf
    • http://pofadiva.jwhitneyart.com/uploads/1/3/0/7/130775565/2726583.pdf
    • http://files.uplandsrecreationcentre.com/uploads/1/3/2/6/132683137/3658293.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/jojiravi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/the_red_army_and_the_second_world_war.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/standar_akreditasi_puskesmas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/64457052641.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/fawanisaxevekom.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/betedosopinadipisufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/boveda_72_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/free_vector_business_letterhead_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/tuzekunapejubowilivipa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7377/files/kenimen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044f8.bin
892791286fb6edc048cb1235b83ed230f4d05df1b22edc354313b63f8bef1734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F8 5548 bytes
font_01_sfnt_off000057e6.bin
128196eb6e27a0a93724027f37d2ed4f9b14fc73301e0d5af7f885bfb55d4aa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E6 9956 bytes
font_02_sfnt_off000079f9.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F9 4324 bytes

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