Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bb02e022763f02…

MALICIOUS

PDF

55.9 KB Created: 2020-08-06 00:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba3f71fa6d67173a17b0ea4c70a401a6 SHA-1: d0e4e3e24aea9dcd20348c30f2ce14163f281d77 SHA-256: c2bb02e022763f0255174daf9141ef213e2c1eb92eed8a1ba163aace257dc0c3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=non+verbal+reasoning+test+questions+and+answers+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure for 'non verbal reasoning test questions and answers pdf', likely to entice users to click the malicious links.

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.cc/pify?keyword=non+verbal+reasoning+test+questions+and+answers+pdf
    • http://xijupenu.magnoliabodyworks.com/uploads/1/3/0/7/130740596/vinujodi.pdf
    • http://giligel.brazossunrisefarms.com/uploads/1/3/2/3/132302780/d727c58a6.pdf
    • http://files.buffalohats.com/uploads/1/3/0/9/130969448/30967c.pdf
    • http://files.wildernessmysticism.com/uploads/1/3/1/3/131379118/vesaluf.pdf
    • http://files.torrainewalker.com/uploads/1/3/0/8/130874683/fonozezaraw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/liragiwufodevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/banking_regulation_act.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/kewojipewigominepope.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/45275970584.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/gesisikiveji.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/82182291120.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/71419717816.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/aaos_back_conditioning_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/sai_satcharitra_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/89042468080.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/zuzagololamifawoko.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007343.bin
e6d14939f4c536b0c1246556ed86a67b2f09e05f6eff00a7864912a1a52cc66c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 5596 bytes
font_01_sfnt_off00008662.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8662 3720 bytes
font_02_sfnt_off000091c5.bin
928d5db0f52f25fd41e24e33623ed71171cf06501e232fe7499dd2fead91d421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C5 10240 bytes
font_03_sfnt_off0000b4d7.bin
129ce2e70bfadedc8bf468a9d424b2853ae413f4de559ddfde56e57885348952		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D7 8760 bytes

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