Malicious PDF — malware analysis report

Static analysis result for SHA-256 d517a1380acfd976…

MALICIOUS

PDF

34.8 KB Created: 2020-08-20 01:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b656fffc84cc4cf0d7b7b1d7b85ff126 SHA-1: 1feb99f1b09435e5d7cb3af17394c617c8eddd31 SHA-256: d517a1380acfd97660ac1fb8ca7ba7eb1e8645ca4f24ccd3cb17c573651be359
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 malicious redirector links and a link farm. The document body, though heavily obfuscated, contains references to the same redirector URL found in the heuristics. The primary attack vector appears to be luring users through a deceptive link farm to a malicious redirector.

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=capitulo+2a+realidades+1+answers+page+31
    • http://files.infinitemansummit.com/uploads/1/3/0/9/130969768/8917ca2cb368abf.pdf
    • http://files.mrkevinkimmel.com/uploads/1/3/1/8/131856851/somowugofev_bewanos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/sezokegimutigobasebezedoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/jejimupemaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/45654516993.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/notoxutamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/58745998345.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/buzaxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/tifagezezisav.pdf
    • https://cdn.shopify.com/s/files/1/0438/4561/5766/files/78126702252.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6726/files/sujawikosopegoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/2d_cartoon_maker_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6422/0055/files/50524924315.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/50296171100.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/31271316498.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/ziraxizopebixagatogevi.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_off00004a42.bin
9477ffd901bb8b4f7eb252072269c1cc9f561db3b54c01505a5bf4c0f7e41d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A42 5472 bytes
font_01_sfnt_off00005d03.bin
fad21f57061db116aa178428f11083cad4b928252c45f7b683fdf1b244cfa639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D03 9716 bytes

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