Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ebe1d4b44790ea…

MALICIOUS

PDF

67.4 KB Created: 2020-08-18 21:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 024b6a6c9d7de455d89d9fbaa828e578 SHA-1: f760a125eee124ede5dea7e69872f5ff092e5776 SHA-256: 17ebe1d4b44790ea67ff7e63cc6f6884c9a07d83651601784e16353a69de0c29
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to known malicious redirector infrastructure, specifically `ttraff.ru`. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to a "Db realty annual report 2016". The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm or SEO manipulation tactic 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.ru/pify?keyword=db+realty+annual+report+2016
    • http://tovisagu.mymathfolder.com/uploads/1/3/0/7/130739967/4671996.pdf
    • http://vipumajov.findswitchsave.com/uploads/1/3/1/3/131383813/sazuk.pdf
    • http://vutedo.belleaurum.com/uploads/1/3/2/8/132814930/sawosimafafo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/67918596536.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/bsis_firearm_permit_renewal_form.pdf
    • https://cdn.shopify.com/s/files/1/0446/9719/0556/files/convert_file_into_editable_word_document.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/kubekonoditureji.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/31651646723.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/lodipuluxoge.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/26664662394.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/36606558429.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/gowonej.pdf
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/guidebook_death_note_13.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_off0000cb35.bin
71db49acb14ec97659eb8b7d2aaed0d8a25dd194a6d332ef233f5208cefa283a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB35 5356 bytes
font_01_sfnt_off0000dd7e.bin
0d9003fc24c41b3aec3d64c4bdfd2333315e75b573007cbf2e383ca2e1539069
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 10264 bytes