Malicious PDF — malware analysis report

Static analysis result for SHA-256 b103d9583e6a967f…

MALICIOUS

PDF

51.4 KB Created: 2020-08-10 16:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e4a7cb921de0129f439b1b3e76a6c46 SHA-1: b54bfa3b1807968f170b3c72b41283f6564b96e0 SHA-256: b103d9583e6a967fe013abcde02ed36c60f27e8359ee34cf749af0c2ca9ebe00
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL and appears to be a lure for users to click on it. The ML_NYX_PDF_MALICIOUS heuristic also strongly suggests malicious intent. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm designed to manipulate search engine results.

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=definition+of+lifestyle+pdf
    • http://files.whitethornherbals.com/uploads/1/3/0/9/130969573/954346.pdf
    • http://files.putinbayweddings.com/uploads/1/3/1/1/131164531/gapofivawopo.pdf
    • http://files.winstonawilson.com/uploads/1/3/0/7/130776267/zolovojidum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/bigalox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/wuwafik.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/921557615.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/47126860042.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4077/files/nigofinusotusowuporin.pdf
    • https://cdn.shopify.com/s/files/1/0437/6087/7729/files/generos_literarios_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/cabin_in_the_woods_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/7914/5374/files/jay_z_death_of_autotune.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/difference_between_remote_sensing_and_photogrammetry.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/vevekofupur.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/veravumakopawonapewaber.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/99271119483.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/91792688202.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_off00008d21.bin
6a3c1b9c5e5236d4a7de10c3474c72a36f9ed95e6d67d0146881ec8f1f469c20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D21 4832 bytes
font_01_sfnt_off00009db4.bin
38e4426b6446a208be3278682bc5ae37c4a8679d60710e11dfeb1388e89211e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB4 10204 bytes

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