Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb09caabbfbda16…

MALICIOUS

PDF

46.3 KB Created: 2020-09-20 10:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddb423b785a871edecebede8b7bdb04e SHA-1: 4dfe3215964a8754ff9db86e4241f9f7cebc88ef SHA-256: 2cb09caabbfbda16f5ca4c028bbe3b222c75aa7f381b4f501ce29cbad4aef1a7
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to database operations ('difference between truncate and delete in snowflake'). The presence of a link farm heuristic further indicates a malicious intent to distribute links, likely for phishing or malware delivery.

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.link/wix?keyword=difference+between+truncate+and+delete+in+snowflake
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/penizigusorewor.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1119/files/oxford_bookworms_library_stage_6_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/74431119536.pdf
    • https://cdn.shopify.com/s/files/1/0432/5346/5243/files/dsc_power_832_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0981/0343/files/figunaxaxidamovutazudisix.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/512-_421-_4880.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/qradar_vulnerability_manager_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9762/files/dizakufuvoturowavub.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/fitawozenaxejobirog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/soul_calibur_2_cervantes_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/18127843540.pdf
    • https://d71710c4-c8bf-4910-bcef-f89dd3c2fc56.filesusr.com/ugd/769f78_d4ad61e3d1364c92ac7ad17e0ba04422.pdf?index=true
    • https://5ca468ed-9298-48b4-9f29-92f24a220a78.filesusr.com/ugd/b58d21_26412ece03cb4b97bbdc723e7800dd36.pdf?index=true
    • https://7dbfd526-3cf2-44c8-aa2a-ed03bbed4275.filesusr.com/ugd/87b9a8_f4727df209ee43d6ac485bbbf0b5fada.pdf?index=true
    • 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_off0000698f.bin
b7410106a53afa67f8ad8860df2bd9533623410fc73446fbc7de9e6d0045d020
pdf-font-stream PDF embedded font (sfnt) at offset 0x698F 5312 bytes
font_01_sfnt_off00007bc7.bin
6305d1383a03d72350ec8c933c2296bfc3d6c182358f73bc9781d83579a23eb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC7 15236 bytes