Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1dcdfdbb1ee03f…

MALICIOUS

PDF

92.5 KB Created: 2020-08-13 23:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03e2a5748f0a184ac6416621d107f16f SHA-1: 32ef2e1d6c18f5f6281273568c2d88f84bd119bd SHA-256: 2c1dcdfdbb1ee03fd346da30cc0b2836ef5483799abe27046c6440472134a8d1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword relevant to the document title. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=bellini+intelli+kitchen+master+manual
    • http://files.shopgeorgiosbottega.com/uploads/1/3/2/7/132711999/bejidazodawaj_volipemasazez_rafefovovasevoj_kisupejimavilux.pdf
    • http://gugop.joshualively.com/uploads/1/3/2/7/132741555/2809308.pdf
    • http://vogovep.mendonuptonmusic.org/uploads/1/3/0/7/130775934/xevulefu-pagejejeja-zetogigijak-figez.pdf
    • http://xenejid.bartlettgranite.com/uploads/1/3/1/3/131378776/2253080.pdf
    • http://files.sungminrho.com/uploads/1/3/2/3/132303118/dorux.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/preparation_of_culture_media_microbiology.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/15105673965.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8291/files/march_bulletin_boards.pdf
    • https://cdn.shopify.com/s/files/1/0441/1890/0888/files/history_of_african_union.pdf
    • https://cdn.shopify.com/s/files/1/0440/7105/9608/files/aachar_sanhita_rules_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/kudenesuxotuxese.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/56347186832.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/15483619252.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/93754742424.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/basic_knowledge_of_computer_network.pdf
    • https://cdn.shopify.com/s/files/1/0438/9725/8136/files/bijogunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/61744950129.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/download_multiple_file_in_php.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_off00012fd7.bin
65a161021a90f34527af74544b9002989ac0a3cfe3edf7d73aa228d88e926678
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD7 5152 bytes
font_01_sfnt_off0001412a.bin
ad700b28c454dba8e4b89f6f7f3228095e368339200e37d2f8ce6bdb3067bb08
pdf-font-stream PDF embedded font (sfnt) at offset 0x1412A 10240 bytes