Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5fb1d71ccebf7b…

MALICIOUS

PDF

50.3 KB Created: 2020-07-21 07:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de60ee65f32e4db4570dfdc197afa216 SHA-1: 2bd028653c8edca51dc0e74ce7e19273e527f18f SHA-256: 8a5fb1d71ccebf7b26617c781fe2f6c0b869925cbf85f477af5dedcbec181c6e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that these links lead to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to a book title, likely serving as a lure. The primary attack pattern involves directing users to malicious sites via these embedded links.

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/wb?keyword=guy%20de%20maupassant%20le%20papa%20de%20simon%20pdf
    • http://files.affordableeventsandplanning.com/uploads/1/3/0/7/130776755/88573b.pdf
    • http://files.soapforyoursoul.com/uploads/1/3/0/7/130776022/pukuvorekemako.pdf
    • http://files.laurainthelibrary.com/uploads/1/3/0/8/130814258/bumurorulujixevibo.pdf
    • http://files.pro-can.org/uploads/1/3/0/8/130814346/7186492.pdf
    • http://files.awakeningshalom.com/uploads/1/3/0/7/130775009/6959746.pdf
    • http://files.affordableeventsandplanning
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/zijivaperinogazekaviza.pdf
    • https://cdn.shopify.com/s/files/1/0437/4223/2725/files/selulopazotimevoxinasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/jogaketosa.pdf
    • https://mivonozav.files.wordpress.com/2020/07/lifoj.pdf
    • https://foxiwewuko651150165.files.wordpress.com/2020/06/lejagefupug.pdf
    • https://borakav.files.wordpress.com/2020/06/19040522686.pdf
    • https://gozikes.files.wordpress.com/2020/06/88180327568.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/ridinitilimezise.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/19899722917.pdf
    • https://cdn.shopify.com/s/files/1/0437/6667/7655/files/87726262785.pdf
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/82474908881.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/vivonuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/xumojewok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/tedidutokujeliminujedu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000833f.bin
8082e1c866d95cfc09e94b8db82524679f162c1e1fb3887712c3b41d3e067961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x833F 5104 bytes
font_01_sfnt_off00009496.bin
3fe8310f2ac4748a126f3497a22dc514b02b0500baded81c4ff1e52ead58eeb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9496 12472 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.