Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbea846cafb4ac61…

MALICIOUS

PDF

72.5 KB Created: 2020-08-08 11:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8b04f8ea45cc9e396e88f5236eeee85 SHA-1: b1e9dd654c10fe8d2308402c3861b8e863dc7834 SHA-256: bbea846cafb4ac61a026ba9e6e0c86998d41ac7a767d690ef1e23c147cecd3d4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, ttraff.com, is identified as a malicious redirector. The document body, though heavily obfuscated, contains the text '7 cancer cure cover ups pdf' and the malicious URL, suggesting a lure to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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=7+cancer+cure+cover+ups+pdf
    • http://gokevi.miladyousufi.com/uploads/1/3/1/4/131453990/9318699.pdf
    • http://files.vitalhealthwoodstock.com/uploads/1/3/2/6/132681586/nunovos.pdf
    • http://files.greyteakettle.com/uploads/1/3/0/8/130814430/6cdf078cbc818.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9078/files/night_of_the_twisters_dvd.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/tuwafupakowanixepijinuvur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/attack_of_the_b_team_mod_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/riwofugorezes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3201/0152/files/kukolavuwenitumenum.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/12476988032.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/67556974264.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/java_spring_tutorial_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/mitipovurasagumejolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/14774661954.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/wikuwafakod.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/github_clone_branch.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/89938631834.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cce0.bin
2272afcf925b225937a725ddcea1016cd534b791f07a4dbb5ca14218ce8154ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE0 4916 bytes
font_01_sfnt_off0000dd94.bin
3effc4a4ff82e4014fe63d683a9391e06b3714f68dfcd9438d65324a77855bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 12744 bytes
font_02_sfnt_off000106cc.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106CC 4324 bytes

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