Malicious PDF — malware analysis report

Static analysis result for SHA-256 17810ffdc17638cb…

MALICIOUS

PDF

44.8 KB Created: 2020-08-08 06:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f90b991324507e2d2fe317cfd91ed771 SHA-1: 809f547f1ca32fecc9a32b57ab512ccba90bdf5b SHA-256: 17810ffdc17638cb34a9afcaff2311effa5f9335a63b556b2fc88792c2e6c48d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to drive traffic to malicious sites, likely for phishing or malware distribution.

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/wb?keyword=data%20analysis%20report%20pdf
    • http://files.shamaratarian.com/uploads/1/3/0/8/130874332/misivafuk-gapud-kurosazozil.pdf
    • http://files.zestbakeshop.com/uploads/1/3/0/7/130738569/wanodu-tedurizekunoz-dabimerujegit.pdf
    • http://files.everydayarteveryday.com/uploads/1/3/0/9/130969057/a904b0eecff.pdf
    • http://sapulubo.thebarrelhousellc.com/uploads/1/3/2/6/132681670/8695706.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/75756842737.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/pendidikan_agama_islam_kelas_10_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/dixubunadoxavuwakasobiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/25579210971.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/78091602033.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/35836849248.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/ladisuneje.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/40189957444.pdf
    • https://cdn.shopify.com/s/files/1/0435/7043/0115/files/successful_algorithmic_trading_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/sifozutur.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/kitazeritesazamedarawozu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2716/1507/files/pejivomapanajor.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/36615183380.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_off00007209.bin
77f5d7db866788caeca0d0f11c54ce55ae182ed7cacf72841fb70ed1f4967079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 5136 bytes
font_01_sfnt_off000083a4.bin
58d1115ee8d516fb79e49b1d54fe95cb741cd1782acdd27fef264802e2e8daca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 10128 bytes

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