Malicious PDF — malware analysis report

Static analysis result for SHA-256 a163d741168b1f7d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-21 21:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd84b2040b263b470cc50c6852bf05e SHA-1: e95594fd8ea56315c5a8d1d7e05c92af135a0a6a SHA-256: a163d741168b1f7d276e28b450caa13a56f2a2b401db2bd807404f82a7e7920b
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The document body, though partially corrupted, contains text related to a 'free spider solitaire app for android' and the malicious redirector URL, suggesting a lure to download potentially unwanted or malicious software. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to known malicious infrastructure.

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=free+spider+solitaire+app+for+android
    • http://files.nweprowrestling.com/uploads/1/3/0/7/130739544/5ef45f8.pdf
    • http://files.scoligirl.org/uploads/1/3/2/6/132695732/furoliga.pdf
    • https://cdn.shopify.com/s/files/1/0462/5255/6437/files/gush_etf_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/xukudakowisax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/6844335479.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0551/files/83890688131.pdf
    • https://cdn.shopify.com/s/files/1/0454/3050/5628/files/comic_after_effects_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1907/5737/files/eduardo_galeano_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/24808282165.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/92077318110.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0630/files/44430997426.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_off00006679.bin
293420bff27984212b49271f4e1d2931ad31e19a95733d6e71a93fc217c64086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6679 4988 bytes
font_01_sfnt_off00007780.bin
e012bd10e14ff4073ad76b24a8736d8b7f6312cc5642a1dc5128a208b2a7e6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7780 10460 bytes

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