Malicious PDF — malware analysis report

Static analysis result for SHA-256 211b3b88a767f3c2…

MALICIOUS

PDF

43.2 KB Created: 2020-08-09 05:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45da046aec1514121fe0e4626fedcbf3 SHA-1: efacaa7cf078936debaa13a3878748e0c59c1b70 SHA-256: 211b3b88a767f3c2ac96a266051cc886a6658403ed58229947aafea2abba8e2b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=past+perfect+continuous+tense+story+pdf, which is likely used to funnel users to malicious content. The document body itself is heavily obfuscated and contains many URLs, reinforcing the link farm heuristic. 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=past+perfect+continuous+tense+story+pdf
    • http://xipex.morriswomansclub.org/uploads/1/3/2/6/132682883/8429797.pdf
    • http://files.roofglo.com/uploads/1/3/2/6/132681508/rowelateradofaxosabi.pdf
    • http://files.a100radio.com/uploads/1/3/1/3/131383837/jojotetu-biziw-rotaxozujopov-xosaf.pdf
    • http://files.b-art-b.com/uploads/1/3/1/4/131406811/semomoganokenadu.pdf
    • http://files.lumenhsceconomics.com/uploads/1/3/1/4/131406082/juwonixag.pdf
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/xuvevexunor.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/83284020006.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/23956905278.pdf
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/1_pedro_hernandes_dias_lopes.pdf
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/zoxogusuwaxofigesaba.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/xinekezidibuza.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/java_programming_for_class_10_icse.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/3080562765.pdf
    • https://cdn.shopify.com/s/files/1/0434/5276/0224/files/4201314801.pdf
    • https://cdn.shopify.com/s/files/1/0430/6567/1833/files/data_science_and_big_data_analytics_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/maxej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/vugop.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_off00006b58.bin
d156bdd86b7852127b5a0810b455c3e45998c710d5a510ee8f6876183e71b913
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B58 5220 bytes
font_01_sfnt_off00007d34.bin
934ac8bca4836b399869d240f59066be765501ccfc1d3299a2c1337b9377a6e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D34 10120 bytes