Malicious PDF — malware analysis report

Static analysis result for SHA-256 798f372e05df643e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 06:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd312fe56a7a4ae3ffb1e84ab9484f49 SHA-1: 2e0d30038bd785f9e4d531106df3d479eda89528 SHA-256: 798f372e05df643e017d294dce515c7396393a1c0e3e4712feef4e2972f9addc
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically pointing to 'ttraff.com' with a keyword suggesting a cracked software lure. Another critical heuristic identifies a PDF link farm, with the primary link pointing to a benign Shopify URL but indicating a pattern of mass external PDF linking. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=avanset+vce+exam+simulator+crack' and a reference to 'wkhtmltopdf', suggesting the PDF was generated to host this malicious link. The presence of a 'download button' heuristic further supports the lure. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=avanset+vce+exam+simulator+crack
    • http://pijin.brijcommunity.org/uploads/1/3/2/3/132303354/mixawav_lunikufazujakoz_nobikok_segipegaxesol.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/historias_de_brujas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0432/2607/1199/files/battlefield_4_xbox_one.pdf
    • https://cdn.shopify.com/s/files/1/0447/1144/4634/files/cat_backhoe_operator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2146/5757/files/6050636213.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5423/files/80740590566.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/73991615197.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/wedezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/26796139191.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/86509595659.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/
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/26796139

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4b.bin
b1e877151aaf807c466bdf239ae75e08003205a774028484e51b06fa77f50323
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4B 5124 bytes
font_01_sfnt_off00007ca4.bin
38aae55adb728131ea5f0cf6734bc43d55816f8541ea466c2db844d92f918183
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA4 9804 bytes