Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee8e67e4f7b82b4…

MALICIOUS

PDF

40.3 KB Created: 2020-08-28 02:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 802247da403f90a950d61514a46269fd SHA-1: 4ae168b260cca4c3f0b4e67350232f86e7aa2e99 SHA-256: 0ee8e67e4f7b82b48560172696259684acd9125ee76c2b1621db1207091ad130
154 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, disguised with text related to downloading skins. The document body itself is heavily obfuscated but contains the malicious URL. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content.

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.com/pify?keyword=osu+how+to+download+skins
    • http://files.mybasketball.ca/uploads/1/3/0/7/130740258/1557552.pdf
    • http://files.dillsplace.com/uploads/1/3/1/3/131383727/2009745.pdf
    • http://mepebo.adhlenglishlabradors.com/uploads/1/3/1/4/131405927/zogupanew.pdf
    • http://rawime.sheepprogram.com/uploads/1/3/0/7/130776334/1322385.pdf
    • http://vaxapupa.cowgirlastrologer.com/uploads/1/3/1/4/131454065/8392566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2877/4044/files/kowijurosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/centurylink_router_settings.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/bidopigufowevokoloxime.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/beauty_and_the_beast_piano_music_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/55636455743.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/bimomotovuzagosojol.pdf
    • https://cdn.shopify.com/s/files/1/0437/5111/2858/files/greek_border_clipart_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/nanurubuxomej.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1155/files/xevusuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2646/files/dolulemiliwovonadexiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/pruebas_bioquimicas_para_enterobacterias.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_off00005f64.bin
0cedc1bae2276407e9798466e25dc015ebae7f4f1ade124eb0c3d6187dfd3e80
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 5000 bytes
font_01_sfnt_off0000706f.bin
0bbb8fef17e754a24537ae4017b1af111fb3328c2885349df3d1dd4a1e0adf56
pdf-font-stream PDF embedded font (sfnt) at offset 0x706F 10560 bytes