Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0a67ebc43fd142…

MALICIOUS

PDF

90.4 KB Created: 2020-08-11 07:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e98dc510f589eba3c431f8629c3946b6 SHA-1: 2350809a1a2f42af74d7066cef6abac6b1a35f6b SHA-256: 3e0a67ebc43fd14235be47a4dc5fe0c68baf06fddf6d00ec716dee84aa7497dd
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=the+bacchae+pdf+download', which is also listed as a malicious redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute 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=the+bacchae+pdf+download
    • http://files.100lifelessonswithsistergirl.com/uploads/1/3/2/7/132740949/22dbdad4499a.pdf
    • http://files.numeroo.com.au/uploads/1/3/2/6/132682806/zapinuvol.pdf
    • http://files.nswspruikle.com/uploads/1/3/1/4/131407284/zutari.pdf
    • http://files.ramseymunicipalpool.com/uploads/1/3/1/3/131380759/405294.pdf
    • http://ruxore.ashleypontephotography.com/uploads/1/3/1/4/131407995/goboteten_jotuvegixa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/aviation_week_space_technology_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/xujowunotis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/54285857471.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/20320234395.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/jurife.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/jivinaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/javascriptalert_table1._attr_border_0.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/iris_flower_data_set.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/lutusafu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1865/files/aws_dynamodb_pricing.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/kibovixuvakukukedaxukinol.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_off00012766.bin
b295a69a0ade877836b37ddc2975b7ba5f4c2417fc9c6bdf9f019610b779bd52
pdf-font-stream PDF embedded font (sfnt) at offset 0x12766 5148 bytes
font_01_sfnt_off000138f7.bin
3ee2e188eab2e427123e9d36cb5d5c9a4746c8b89298d171168ddd709b0bd4f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x138F7 10668 bytes