Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c791aead860dba…

MALICIOUS

PDF

37.0 KB Created: 2020-08-04 08:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 502b3bab9ab211f2a9275f14bf66b266 SHA-1: ea7493b0cc4e37c6c805943099d578f0d6ac1c65 SHA-256: 28c791aead860dba863bfacdc8f3d592a21125ca55a3810b7b7b7e131053d936
120 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.ru/pify?keyword=pc+me+pdf+file+kaise+banaye'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The document body, though partially corrupted, contains the same keyword as the redirector URL, suggesting a lure to a fake or malicious page. No scripts were extracted, but the primary attack vector appears to be the embedded malicious link.

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=pc+me+pdf+file+kaise+banaye
    • http://files.lazyacrescampground.net/uploads/1/3/0/8/130874370/73da8e5aec.pdf
    • http://files.lindavanderheyden.com/uploads/1/3/0/7/130775665/wetijulim.pdf
    • http://files.synodnw.org/uploads/1/3/2/6/132681513/gidaliwarajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/31157283061.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/chuyn_i_sang_word_hnh_nh.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/76434254442.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/zegomadet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/35603409415.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/mudiralijas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdf
    • https://cdn.shopify.com/s/files/1/0428/2512/1959/files/git_add_all_new_files.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/kulara.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/42576547376.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/bubufujefadapemudarilef.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_off00005305.bin
274ddc81d4fdc7984ceff15291379159769c7883a124602ba162f7764c6e9e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5305 5512 bytes
font_01_sfnt_off000065b9.bin
4f12fadbfe95a7f1b92c6624fc4f90753eac9db58688f090c71a1f50a660d3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 9820 bytes

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