Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c82e50e9279fe92…

MALICIOUS

PDF

48.4 KB Created: 2020-08-23 23:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98db66a35eee1338672d2f6794e1a44b SHA-1: 7eee0a9b452c78b8896a4db40cd6b8fa888b295e SHA-256: 8c82e50e9279fe92ce9424e7c2d109390032e39b4e7c133fbc1c9962652ac679
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicative of SEO manipulation or a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=good+food+guide+hobart. The document body contains garbled text but includes the same URLs found in the heuristics, reinforcing the malicious intent.

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=good+food+guide+hobart
    • http://files.robynpforrryan.com/uploads/1/3/1/0/131070491/lapigitebuwes.pdf
    • http://pedomefi.redlineinstallers.com/uploads/1/3/2/6/132680981/jojufunijovowewobu.pdf
    • http://topuvowur.bremermountainbaskets.com/uploads/1/3/0/8/130814995/wudumoxolowenupur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/ptet_college_allotment_list_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/26664038800.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/14036667614.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/42087136432.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/kindergarten_color_pattern_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/wuzudikolovasav.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/39932783708.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/dixiwadunatulafuzijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/gofemabegogavepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/63180214575.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/paxawipokubewovur.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/97516295757.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/soal_akuntansi_perusahaan_jasa.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_off00007f02.bin
b7fb4100fa9647982618653fa2d5da4397b3461832f6bd13f701361bd60295fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F02 5128 bytes
font_01_sfnt_off00009072.bin
c4fdf8222fac6e04f3d5bc74e3f41ca0e27183db5e929e060e6c88e5d92ed174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9072 10652 bytes

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