Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a101e5dfd0fa44…

MALICIOUS

PDF

52.5 KB Created: 2020-08-06 19:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c7f374efb7ffc149a1bd5a812ecbd3f SHA-1: cdcf21f42f7e3550ed935638711a7e99d1d3a052 SHA-256: d7a101e5dfd0fa44de2f00acad21d5fab75b45b64693e0e4708e4f7d0972c1a6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=benefits+of+integrating+technology+in+the+classroom+pdf'. The document body, though partially corrupted, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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=benefits+of+integrating+technology+in+the+classroom+pdf
    • http://files.drtaoka.com/uploads/1/3/1/8/131871984/sipamijefak-mumaxagiz.pdf
    • http://files.seespotgrooming.com/uploads/1/3/1/6/131607010/zumenotiviruf.pdf
    • http://files.g-icide.com/uploads/1/3/1/0/131070591/6edf909518bda51.pdf
    • http://files.vocabularyninja.co.uk/uploads/1/3/1/6/131607866/44da3be056f9.pdf
    • http://files.mariefulkersonmakeup.com/uploads/1/3/0/8/130814288/zujowawimiviro.pdf
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/wufigurerepavatere.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8766/files/trumpet_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/the_logic_book_bergmann.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/doviluxoduvugofula.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/mexuwavigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82505274200.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7703/files/dowivunugoviv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/gmat_og_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/gojefetatopibetopitadavol.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/2603978181.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/25004126867.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/centroid_formula_for_different_shapes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/24224471107.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/1/0431/5168

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dba.bin
e75ad614d6b2798f2616311ad4e9b2ae80236f8eb93906bc8151872a0d92b735
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBA 5720 bytes
font_01_sfnt_off0000a116.bin
c2247c64b8a6b024185dc6f0bb3ff93f61f6b1c8724b0d08f79739fd3c0ba2f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA116 10224 bytes