Malicious PDF — malware analysis report

Static analysis result for SHA-256 147c966f9d411394…

MALICIOUS

PDF

47.7 KB Created: 2020-08-04 16:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977cf25cc4a6ee6ffec7ec3072ff4cd0 SHA-1: ced5f75716f32c61f64b310432dbcecd3cbb9c9f SHA-256: 147c966f9d411394be58def52bdcb15aadf9f35dc80fcfbd6e2bde0b5d694c66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by an ML classifier and contains numerous links to external resources, including a known malicious redirector. The document body, though obfuscated, contains URLs that likely serve as lures to phishing or malware download sites. The presence of a redirector link strongly suggests an attempt to direct users to malicious infrastructure.

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/pify?keyword=hokkaido+train+map+pdf
    • http://files.traditionalalternative.com/uploads/1/3/0/7/130775795/matibobekapijamidoro.pdf
    • http://files.andrewcdavis.com/uploads/1/3/2/6/132680808/d92ee6ce1bfab.pdf
    • http://files.pelletheaterstasmania.com.au/uploads/1/3/0/9/130969001/mozapidoloxusewib.pdf
    • http://files.fairviewparkrec.com/uploads/1/3/1/0/131070866/wutigoxetij.pdf
    • http://files.ptbopathwayoffame.com/uploads/1/3/1/3/131398139/089bcc8d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/56882890679.pdf
    • https://cdn.shopify.com/s/files/1/0440/0332/8150/files/metro_pcs_rebate_status.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/rodakaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/44261062883.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/zisirijajufilufek.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/8531513845.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/contaminacion_atmosferica_en_el_peru.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/faneg.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/33368561626.pdf
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/63253702522.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007228.bin
cc8892a84038688a82ec3969a1807bf7bbc5e582b37d3bd386ab4fb07e2dadea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7228 4672 bytes
font_01_sfnt_off000081da.bin
fa80df66b575b6cc47e57633ec5c12cad368612c030a69fbf2ec06193c56d68d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DA 9896 bytes
font_02_sfnt_off0000a3db.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DB 4324 bytes

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