Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adf96a0fe4b6a84…

MALICIOUS

PDF

50.7 KB Created: 2020-08-26 16:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dbf0ea3b99a009064f511f2bded3c95 SHA-1: 029e92782f7c98c020834e87c38465e42f91991b SHA-256: 6adf96a0fe4b6a84bffe295f9bdb52c47aafd46c9780e24f1969b0dd6c02ef2b
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=querido+diario+otario+cole%25C3%25A7%25C3%25A3o+comple'. Additionally, it exhibits characteristics of a PDF link farm, embedding 17 external PDF links, many of which point to Shopify-hosted files. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to trick users into clicking it.

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=querido+diario+otario+cole%25C3%25A7%25C3%25A3o+comple
    • http://varorex.fickleinternational.com/uploads/1/3/1/0/131070872/6651946.pdf
    • http://files.bluemountainseimei.com/uploads/1/3/0/8/130814666/pobesepi.pdf
    • http://files.annepatrickbooks.com/uploads/1/3/1/4/131483772/zogogu.pdf
    • http://files.toymigos.com/uploads/1/3/2/6/132681836/0f4b154.pdf
    • http://files.practicingmdleaders.com/uploads/1/3/1/3/131383297/83c7120.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2075/3823/files/fools_rush_in_1997_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/wapomab.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/isolation_of_lactic_acid_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/html5_templates_free_with_login.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/vutuzisajukudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/gawolawuzegigazewejijozed.pdf
    • https://cdn.shopify.com/s/files/1/0438/5118/6336/files/japanese_animation_history.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/ordinal_numbers_1_10_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/netimuxoladofebagod.pdf
    • https://cdn.shopify.com/s/files/1/0439/0970/9976/files/83363699082.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/30557860135.pdf
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/86212029967.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_off00008269.bin
fd6e9f72b883314ee13b15065d17b037c464df2a066c7e5c14ab5d87d5acb606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8269 5600 bytes
font_01_sfnt_off00009481.bin
1ae939883803076abd22725e395e25989c7623b01c67698837651ddcdddc197d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9481 13048 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.