Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff420f054b92f762…

MALICIOUS

PDF

39.4 KB Created: 2020-08-22 13:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac38ec3e1eea7cae1ef07b3722814bcf SHA-1: a28f772cf5cfefec17c92d2f992e08496a4f53d9 SHA-256: ff420f054b92f762223626259a45bb296a2bebe61e78967003bbd4e950e24c4d
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with heuristics indicating a 'PDF SEO Link Farm' and a 'PDF Malicious Redirector Link'. One of the identified malicious links is https://ttraff.cc/pify?keyword=c+a+s+a+full+form, which is likely used to redirect the user to a malicious site. The presence of numerous external PDF links, including one hosted on Shopify, suggests an attempt to manipulate search engine results or distribute content through a seemingly legitimate platform.

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/pify?keyword=c+a+s+a+full+form
    • http://files.serenielle.com/uploads/1/3/1/8/131856626/xizuludereniv.pdf
    • http://files.w4caprinepursuitmininubians.com/uploads/1/3/0/8/130815437/191ddb.pdf
    • http://jisoremu.smithpoolservice.com/uploads/1/3/1/6/131636725/355725b2fb2b672.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/rampolla_pocket_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/zusafuxexogalinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/xisarul.pdf
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/16221533130.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/catalogo_de_tornillos_y_tuercas_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/bizaxetugufupuzizow.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/98752001477.pdf
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/zoparuxotatapefubiwovex.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/definition_of_anaemia_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/vamanokotifogijo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/the_strain_gauge_primer.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/kirigituxeba.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_off00005db7.bin
5af8f6c3db608edc47df87af83d794b936dc61a2ba04e195bf43e1e028453aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 4816 bytes
font_01_sfnt_off00006df5.bin
ae488f7a9849938d66b977cd81e461d2c6a0decefbb6d0e86993529bf4590601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF5 10244 bytes

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