Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc427597982e74f…

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 13:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2896b409d788ee81c03ed60e82cf3530 SHA-1: 882b0159556f14d4947959b2952c0a8978ce6928 SHA-256: ccc427597982e74f9eb1889cb0d1b0d7d37f1fe9be25456b917b5a504670f9a9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to 'Ecuacion de transferencia de calor'. The presence of numerous external PDF links further suggests a link farm or redirection tactic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=ecuacion+de+transferencia+de+calor
    • https://static.usrfiles.com/ugd/b8c837_e43635ec5705449cb025bf6588570ddf.pdf
    • https://static.usrfiles.com/ugd/4725f1_07a05dc50633472588fc32eb5d8708e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c1f3fb7df974c00b7f3a8f0f9b5b514.pdf
    • https://static.usrfiles.com/ugd/930050_c84b9e50645a46ce8ab28ec0b1a308c6.pdf
    • https://static.usrfiles.com/ugd/2c608b_b7475ee142554781bd7f9b223b925489.pdf
    • https://static.usrfiles.com/ugd/b8c837_51daf907da9847f090bb1f03e0535f51.pdf
    • https://static.usrfiles.com/ugd/8cbfce_78a742ed55954bb0849bc998825b2c3d.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_83b1519b6ab04c1a85130ef74972de2d.pdf
    • https://static.usrfiles.com/ugd/ca300b_897deffc04864644b823c55a5d92f823.pdf
    • https://static.usrfiles.com/ugd/55f640_c72d458659114b04b0831fdf41746364.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f859ae14ad842668a2045c447be4da2.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3109/files/fall_of_ottoman_empire.pdf
    • https://cdn.shopify.com/s/files/1/0463/4066/9602/files/gosekebigomijegeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/unduh_happymod_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/nulifogezel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6419/7273/files/xizerivepipupuzatukob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c35.bin
4fa336d20344e5eb8130d864946f7a55d22b1985375e1076540273f47ded167a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C35 4972 bytes
font_01_sfnt_off00006d2f.bin
122967db2ad0bee0212e9f74b95fc16f8c67220cd177d22c74c99663367c7a94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2F 14156 bytes
font_02_sfnt_off00009830.bin
43edd991dd82ac0fa2eca9b739274f2e51255dde0463e5ab0a893647ae73f153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9830 16080 bytes

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