Malicious PDF — malware analysis report

Static analysis result for SHA-256 987d0376af535f9e…

MALICIOUS

PDF

40.5 KB Created: 2020-08-04 04:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e61df3ababa847e8e03fc02a595a96a SHA-1: a2c34a8307078d7b04f5c18e6ff85e025b8327f9 SHA-256: 987d0376af535f9e821e4e9760e0eaecab4c9f9eff01fbeab9b6ed0e5866714e
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=appareillage+et+installation+electrique+industrielle+pdf, which is likely used to funnel users to further malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be part of a link farm strategy to improve search engine ranking for 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.com/pify?keyword=appareillage+et+installation+electrique+industrielle+pdf
    • http://files.stockportmalayali.org/uploads/1/3/2/8/132814567/182916.pdf
    • http://files.loveandmercyfdc.com/uploads/1/3/1/8/131857071/tazowirujuvimi.pdf
    • http://files.detroitcomposersproject.com/uploads/1/3/0/7/130739693/valaw.pdf
    • http://files.saikmusic.org/uploads/1/3/2/7/132740415/67c8893d65fe7.pdf
    • https://cdn.shopify.com/s/files/1/0434/1163/6381/files/install_mono_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/zulojomejibiweni.pdf
    • https://cdn.shopify.com/s/files/1/0437/6510/4791/files/fakosexelavewukelebejabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/bewifekixotaxer.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/magazine_download_sites.pdf
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/gupupajedurut.pdf
    • https://cdn.shopify.com/s/files/1/0447/0777/4618/files/nested_include_in_sequelize.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/dezupapinolunotesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/topavug.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/17132895393.pdf
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/vadizi.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_off00005d45.bin
366a373fd5464d33723adbbb1e9830b9ff7ba42a8c9a8cef0b111b122e09f455
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 5440 bytes
font_01_sfnt_off00006fcd.bin
8cb512e176cafe60b92de2a2b999fa51771d15fe38e8d05be88dc825eae334f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 11184 bytes