Malicious PDF — malware analysis report

Static analysis result for SHA-256 a853aefa481039a7…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 22:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dcd6678f90076f14901cec941c75f10 SHA-1: c26a3df565d3fa5ed931ffc3df6b1b72de33ddbc SHA-256: a853aefa481039a7caefe9ceef6f4bd0aaccb527894063e6cbd4e339c630a3ed
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a malicious redirector link: https://ttraff.cc/pify?keyword=class+10+cbse+maths+notes+pdf+download. This suggests the document is designed to redirect users to malicious sites under the guise of providing downloadable notes or books. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=class+10+cbse+maths+notes+pdf+download
    • http://files.mrjbake.com/uploads/1/3/0/8/130874594/3200957.pdf
    • http://files.deboresearchgroup.com/uploads/1/3/1/0/131069819/wipuveb.pdf
    • http://files.jeanettebrewer.net/uploads/1/3/1/4/131438449/9df68359a49b95c.pdf
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdf
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/creative_writing_a_beginner_s_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2639/8888/files/tesis_de_auditoria_financiera_peru.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/bangla_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/kapanasuroviwanar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/alina_li_hd.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/60507321508.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/vupuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/9103/2216/files/49295768695.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/9064920022.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/blender_2._8_eevee_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0433/9826/7029/files/osu_cookiezi_skins.pdf
    • https://cdn.shopify.com/s/files/1/0448/3599/5808/files/organic_chemistry_solution_manual.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_off00006355.bin
24bffb589b94fbbe19b7116d87465d41e6c3256537f7500e911eceeb6e0c730f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6355 5632 bytes
font_01_sfnt_off00007660.bin
51253c6aa1a27d70f2f2ed90cfc3ac4c611da24916b0b3522120d0c3eda14622
pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 10352 bytes