Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f91e95565de90f…

MALICIOUS

PDF

34.9 KB Created: 2020-08-11 13:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 848e2b7fd1a206c9ae57ef020820859b SHA-1: 7fce3e0bc0e16003c71290d576bc9113dc92d486 SHA-256: c1f91e95565de90fed3b0fcf2eb8867f43ac6318aa11bd6c91146ac0592677a6
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=nra+ap+1+target+pdf`. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The document body contains garbled text but also includes the same malicious redirector URL and several benign-looking Shopify URLs. The primary attack pattern is likely a lure to a malicious site, potentially for phishing or malware distribution.

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=nra+ap+1+target+pdf
    • http://files.lmctotherescue.com/uploads/1/3/0/7/130775544/damatibi-kemiseref-regusanaxeturo-wokagowe.pdf
    • http://files.ecoinclusive.org/uploads/1/3/0/9/130969887/32a5bd098424.pdf
    • http://jogas.christmasinchilhowie.com/uploads/1/3/0/8/130873851/3496568.pdf
    • http://refafi.stayathomebum.org/uploads/1/3/1/8/131857419/5488094.pdf
    • http://files.europeadultdevelopment.org/uploads/1/3/1/4/131453397/319cd3.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/6886687526.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/buremadurizekotovafex.pdf
    • https://cdn.shopify.com/s/files/1/0449/8564/7272/files/ret_bis_legendaries.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/fetoxulakam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/11778212132.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/zaxigavono.pdf
    • https://cdn.shopify.com/s/files/1/0430/6806/3895/files/vutirudutavofipawasof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/88694039161.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/fogomiwivemisefegobeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/2693/8018/files/oscillatoria_sp.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/currency_exchange_live.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/57639638609.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4823/files/vakosovuzunegaluzar.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_off00004aa1.bin
9936f25c37fe4b33fb3dfad357f0bc4eb7879828530cca68c1d35b83be9a4a4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA1 5020 bytes
font_01_sfnt_off00005bcf.bin
3f067c3100cf310ab8573516594ea75aefca6256031731cf97c76bd8cf4f3281
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCF 10164 bytes