Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e590786f38c5fef…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 01:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec30dbed67674913c77abaa16960e8f3 SHA-1: 51d6f48264042fd20ca02654cbb1a76d8aab756e SHA-256: 1e590786f38c5fef82895a9a224db1de20298272afacb5a9b117db84c2986c2a
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.cc/pify?keyword=atresia+biliar+pdf'. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, as indicated by PDF_SEO_LINK_FARM. No scripts were extracted from this sample.

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=atresia+biliar+pdf
    • http://zisusuf.arnikafuhrmann.com/uploads/1/3/1/0/131070450/sutibegad_gezal_mowirifobimamo.pdf
    • http://mejub.bhutaniowa.org/uploads/1/3/1/3/131384401/fa14df4f7f.pdf
    • http://fiwak.brockdvickers.com/uploads/1/3/2/6/132682787/toxoxikix_magaxenafo_murokeboj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/sinevan.pdf
    • https://cdn.shopify.com/s/files/1/0437/2273/5765/files/sony_vegas_pro_cracker.pdf
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/55268538818.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/23658479493.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9469/files/ccna_security_dumps_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/tanediroxeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/95229936503.pdf
    • https://cdn.shopify.com/s/files/1/0450/9810/7045/files/rotten_tomatoes_api.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/20602929096.pdf
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/autocad_2020_new_features.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/voketo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/50414976836.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5398/files/19980316554.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c4.bin
7df9c62000219830377e26e441a9e56aadbf2c03bf90f506cfb668c7ee815ee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C4 4736 bytes
font_01_sfnt_off000078dd.bin
4f5580a32bb5d347a5830c12f8ae0fc796ebf0433d9149d23409b933380fe251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DD 10208 bytes
font_02_sfnt_off00009bca.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCA 4324 bytes

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