Malicious PDF — malware analysis report

Static analysis result for SHA-256 e126417c7d61455a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-05 03:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1280a9398aa91b4151f000e45dd4329 SHA-1: cddb3f09c2e574d03c69132faf27625523ce56a7 SHA-256: e126417c7d61455a19d1db28456adf5d76554a3c4dee5fc6248dc2169d1cfab9
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=recent+banking+awareness+questions+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious content under the guise of educational material.

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.com/pify?keyword=recent+banking+awareness+questions+pdf
    • http://files.studiobmontana.com/uploads/1/3/2/6/132682042/9967005.pdf
    • http://files.suitsswagger.com/uploads/1/3/1/4/131453124/tuwewinil_loxipesalexun_rupabujaveja.pdf
    • http://files.highcountrycorals.com/uploads/1/3/0/7/130739780/edadb3e8e0.pdf
    • http://files.gracemankato.com/uploads/1/3/1/4/131406558/votedip.pdf
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/vocabulary_for_academic_ielts_writing_task_1_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/4th_grade_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/net_framework_2._0_sdk.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/reproduccion_animal_y_vegetal.pdf
    • https://cdn.shopify.com/s/files/1/0447/9015/3365/files/concise_biology_class_10_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/10520415912.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/california_dmv_forms.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/wow_hunter_macros.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/certificado_de_origen_tlcan.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/58231017228.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/30609923222.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/81976658945.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/48135410210.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_off0000624e.bin
95a746113e93ac80eb8d69e3feb165e473255b0b395ec314ba919992ed2a1e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x624E 5720 bytes
font_01_sfnt_off000075e8.bin
2f65595768f5e7d077ce3741dbdfbed8c7971e7f63b9aae033dd170794db692d
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 12960 bytes