Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2970bd5c284f16…

MALICIOUS

PDF

57.4 KB Created: 2020-08-06 12:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68fb839b42d5ba49108d8e13b18749b4 SHA-1: 9625a1d14a7921a34e6f110235702ff3732ccab9 SHA-256: 1a2970bd5c284f1619968b67a72b91458a65fe07ca9afd73a297ce51dc89012a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a link farm designed for SEO manipulation. One critical heuristic identified a direct link to a known malicious redirector, ttraff.ru, which is disguised as a download for 'maths basic formulas pdf free download'. This indicates a phishing or scam attempt to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=maths+basic+formulas+pdf+free+download
    • http://files.joeganech.com/uploads/1/3/1/3/131398085/2416324.pdf
    • http://viwunamub.trappercreekoutfittersltd.com/uploads/1/3/0/7/130738943/pewejatanalijofawe.pdf
    • http://files.angelinmyear.com/uploads/1/3/0/8/130813851/7d1b67570.pdf
    • http://files.freehandsilversmithco.com/uploads/1/3/1/6/131606803/gejaxisugux-toxizereja-zejol.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/65754669392.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/362157335.pdf
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/mulomexewuziwapanana.pdf
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/pejenumajekabokamez.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/81663150378.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6972/files/zovoxuwezobesu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/26533520309.pdf
    • https://cdn.shopify.com/s/files/1/0438/3146/0002/files/zajuwitoziduko.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4534/files/77799183447.pdf
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/pojovibonu.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_off00008ab5.bin
0642b9d4c7996981347eccf8e0028485161814e22b96a79e01f87a9402d1373a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB5 5512 bytes
font_01_sfnt_off00009d50.bin
c4f7fa9f5ce81c1c1c2c8c7b9d08fee9899c0ccfe0419497024c546c75b8c0f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D50 14332 bytes
font_02_sfnt_off0000cab7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB7 4324 bytes

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