Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f72eeebde47e61…

MALICIOUS

PDF

43.5 KB Created: 2020-08-22 17:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bb6fea4ebfc4fc3bf34e4b3c7a63748 SHA-1: 31337b1d8fdab456af49615c2b1068563d7b2d06 SHA-256: f1f72eeebde47e61ca576447cba539161520ce4e87c83a1cac741d19909c6f2d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, with the primary malicious redirector being https://ttraff.ru/pify?keyword=balladeer+medium+font. The presence of a large number of embedded links suggests an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=balladeer+medium+font
    • http://xanuveraw.performingartsworkshops.org/uploads/1/3/2/6/132682883/wirukap.pdf
    • http://files.olas-sanctuary.org/uploads/1/3/1/3/131384025/gakubupi_kikinaf_vapopa.pdf
    • http://modak.learnaboutonline.org/uploads/1/3/2/8/132814930/2f3754.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/pdf_to_word_converter_software_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/17675338134.pdf
    • https://cdn.shopify.com/s/files/1/0464/9441/7064/files/canon_pixma_ip2700_driver_mac.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/78123478030.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/times_university_ranking_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/airtel_busy_caller_tune.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/kifeduguwid.pdf
    • https://cdn.shopify.com/s/files/1/0437/2443/9704/files/wolutozamavek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/36029535406.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/desosomojakiridipusina.pdf
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/remington_ballistics_android_app.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/windows_7_repair_disk_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/ff8_weapons_guide.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_off000056ee.bin
59cb48199ab05f12841c680c0933723bbf8453f79a12678e482e34ffcededd70
pdf-font-stream PDF embedded font (sfnt) at offset 0x56EE 4924 bytes
font_01_sfnt_off00006795.bin
f3b841f844db8374a208ef95b3a9ce10077883725e3c3ce5aedc51a061c02b81
pdf-font-stream PDF embedded font (sfnt) at offset 0x6795 10636 bytes
font_02_sfnt_off00008c3c.bin
ce90dcb8f80a691a226d66d7b9fb40db13b52946125f6d312f8860abae454107
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3C 16084 bytes