Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef924e5d1204492c…

MALICIOUS

PDF

61.4 KB Created: 2020-08-11 21:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad7149343ca529095f793e415606b45 SHA-1: f47f22840e4982b945483d9526569092c7c48ec4 SHA-256: ef924e5d1204492cf372c62776a9b87b0ef7daceb22bd78494ebba8a886016fc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=barriers+to+international+trade+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same redirect URL, reinforcing the lure to click the link.

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=barriers+to+international+trade+pdf
    • http://files.joyfulclay.com/uploads/1/3/1/6/131636728/povipazugofa_xulotaxete.pdf
    • http://files.lakerupdate.com/uploads/1/3/1/0/131070035/01b561376.pdf
    • http://files.ottawaherefords.ca/uploads/1/3/1/4/131438071/gipitivetikazagip.pdf
    • http://samafiv.stantonstgabriel.com/uploads/1/3/1/4/131406893/8037525.pdf
    • http://sonemazi.birdonthewallphotography.com/uploads/1/3/1/4/131437657/81c0f42a49b7b.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/rawikudoferosurej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9317/1103/files/16451164516.pdf
    • https://cdn.shopify.com/s/files/1/0438/9024/5787/files/kazajogejutowijoke.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/besagemuwakewakivu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/vujutajutivukefuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/48045040961.pdf
    • https://cdn.shopify.com/s/files/1/0434/2120/4631/files/38538529213.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/53042895569.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/faxagefikobowu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/kidenewitosabozejasajot.pdf
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/fejezisozelodoramirigedid.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_off0000a525.bin
4a42e29d056321211b33f28ffccde0a80e8e7bbfa5fb76b71d16baec8476bb0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA525 4872 bytes
font_01_sfnt_off0000b5b8.bin
cf222436a7d695f4a3db932c02a00caf847e18a2973d4e903f445a0457983797
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5B8 10808 bytes
font_02_sfnt_off0000da90.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 4324 bytes