Malicious PDF — malware analysis report

Static analysis result for SHA-256 86db095bc41602fc…

MALICIOUS

PDF

41.1 KB Created: 2020-09-01 05:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae42d8aeaf85486ec30eb175f1f0b6cc SHA-1: 0cfc683903ad3b325e6840fb650a3539b5f7c300 SHA-256: 86db095bc41602fc510ad0c52f5377a4b4474f45b6ca26825ea2d56a4858fe7c
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains a visible download button lure and numerous embedded links, many pointing to Shopify URLs which are likely part of a link farm. The primary malicious URL is https://ttraff.com/wix?keyword=esl+christmas+worksheets+printables, which likely serves as a gateway to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=esl+christmas+worksheets+printables
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/16484185542.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/77687668556.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/mezujusozugijoxisomidezug.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/fernando_pessoa_book_of_disquiet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/firexuludak.pdf
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/engineering_mechanics_centroid_and_centre_of_gravity.pdf
    • https://cdn.shopify.com/s/files/1/0462/3902/3253/files/fetuzubimugafewubusa.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/addition_subtraction_table.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/death_of_the_salesman_summary.pdf
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/suxusarujimixaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/gowega.pdf
    • https://cdn.shopify.com/s/files/1/0435/2147/4714/files/econometric_analysis_greene_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/fekemakajokozez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/75931386265.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1088/files/divorce_application_form_download.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_off00005e1b.bin
2bedc2a9b8cfb4880fd31f259c2bce1bea00cae23117bc77469e5539225bfe01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 5424 bytes
font_01_sfnt_off0000706e.bin
0699461a4631c424020d94f0040653f731a4e9d8cc9f46eab106039fc95a4d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 11604 bytes

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