Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bb6cd18ed8fcf9…

MALICIOUS

PDF

52.4 KB Created: 2020-08-20 20:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c40fca57b2729b2a7ef51e05a3e1fd SHA-1: 3d0da2c28fca436f562c5b7741485c63acd23527 SHA-256: e1bb6cd18ed8fcf9b496fd419dabd38775c02a56826fcbbd71bd72fbf0196441
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.cc, which is designed to lead users to malicious content. The document also functions as a link farm, directing users to numerous external PDFs, many hosted on Shopify. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector and the link farm structure suggests a phishing or social engineering attempt to direct users to harmful sites.

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=emotional+intelligence+and+leadership+performance
    • http://bexotedom.kathrynluster.net/uploads/1/3/1/4/131438873/9494388.pdf
    • http://files.juderoseaccountancy.com/uploads/1/3/1/4/131437311/4377885.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/sugavonexixaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/juwemasasimufozaralukas.pdf
    • https://cdn.shopify.com/s/files/1/0447/8962/9079/files/accounting_basics_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3511/files/57819160973.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/acs_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/inventor_3d.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/10442477935.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/42960506343.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/lonabogironu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/hazelwood_primary_school_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/kuremif.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/lofezuweworiti.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d46.bin
85d31c0ce8898e56953c7149b40ab8398981ea3ea395af600dc832b941b0d925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D46 5312 bytes
font_01_sfnt_off00007f1d.bin
dc7d8e3cc66f0fc47218cae1526047665c96ee761ec9d987d57c96afdb5262ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1D 9940 bytes
font_02_sfnt_off0000a13e.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA13E 16060 bytes
font_03_sfnt_off0000b5d5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D5 4324 bytes

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