Malicious PDF — malware analysis report

Static analysis result for SHA-256 d112e45b96fb49e2…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 13:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e84c5b924bff7c40aebdbc8b0824034e SHA-1: 2521f87daadb1efcd5fdd437bcebea7153df5fcb SHA-256: d112e45b96fb49e2b96b9a7427882d9cedb4167546d80d2889354c41fb2dabbb
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users into clicking on it. The document body, though heavily obfuscated, contains references to 'video converter online' and the malicious URL, suggesting a social engineering lure. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm techniques used 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.ru/pify?keyword=video+converter+online
    • http://files.red-bean-coffee.com/uploads/1/3/1/6/131606733/gifotamevixok_lizufixuranura.pdf
    • http://files.animaliadiertraining.net/uploads/1/3/1/1/131164476/8666987.pdf
    • http://files.papermagicbook.com/uploads/1/3/1/8/131860787/nelakojopotazedi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0714/7166/files/lowezaxawobigozovudofele.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/statistical_methods_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/dikoritejovaf.pdf
    • https://cdn.shopify.com/s/files/1/0441/1850/7672/files/aadhar_card_pass.pdf
    • https://cdn.shopify.com/s/files/1/0435/9795/5229/files/developing_android_app_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/zojizumodezajiji.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6854/files/55323477926.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6597/files/83695086366.pdf
    • https://cdn.shopify.com/s/files/1/0428/0388/8287/files/7354775843.pdf
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/92341729420.pdf
    • https://cdn.shopify.com/s/files/1/0429/5137/7049/files/76799150108.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_off00006e0c.bin
ace62aa57155696c393bedd8e202385ac2d3852c6c0f638cab363c6892d0493f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 4568 bytes
font_01_sfnt_off00007da2.bin
27eb3ff92d937954ad0e507ad5a4ac560800171a25e3f5f053c8913ca1c58992
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA2 10376 bytes