Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a29841e20742c60…

MALICIOUS

PDF

38.5 KB Created: 2020-08-28 10:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 187087fd394c122e564b188cb5f308e7 SHA-1: 1558de327c744d5573db40f8a2fd9cfeef4345df SHA-256: 0a29841e20742c609f3f0110826f18bd0ecdfddd6dfc74b01b0b078f56129a3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the primary malicious redirector, suggesting an attempt to direct users to harmful content. The presence of numerous external links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the ultimate malicious destination.

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.ru/pify?keyword=imperial+armour+8th+edition
    • http://files.desertmirageaquatics.com/uploads/1/3/1/8/131856306/9775466.pdf
    • http://mudezifam.localzak.com/uploads/1/3/2/6/132682076/e959b.pdf
    • http://fetixilus.embodylifeyoga.com/uploads/1/3/0/9/130969690/b898176f5b8.pdf
    • http://komirujo.centralvirginiapickleball.org/uploads/1/3/1/3/131380397/puzufesigib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/26672442637.pdf
    • https://cdn.shopify.com/s/files/1/0437/6186/0757/files/azoteas_y_muros_verdes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/army_song_full_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/caterpillar_generator_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/kjv_1611_with_apocrypha.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/el_libro_rojo_del_anarquismo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/47759796716.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/kesezumomifi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/farivinipawoguzemivope.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5873/files/1737748339.pdf
    • https://cdn.shopify.com/s/files/1/0439/8471/5934/files/happy_birthday_piano_sheet_music_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005853.bin
6e87d365da7e894be46fd36f30ce8ed73b532860ffe43fcb771407d32f7a3b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5853 5152 bytes
font_01_sfnt_off000069a4.bin
e960b67455de96c8fce635d3c1f579206c1005ef3a15e6d1e62ec513e17de2f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A4 10420 bytes

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