Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2265bd2b2028e6…

MALICIOUS

PDF

39.6 KB Created: 2020-08-15 18:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 226c5c4cd140e60d992952106e9fe0a7 SHA-1: c07ae2d7bf8732734ef2f249447e56c89c4b91dd SHA-256: 1e2265bd2b2028e6a5da5c5a9c2f433c126c760bdf9e99703318ef161d178a3c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to improve search engine ranking for malicious content. The ML classifier strongly indicates 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.cc/pify?keyword=cae+gold+plus+exam+maximiser+pdf
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdf
    • http://files.elrinteriors.com/uploads/1/3/1/4/131453817/dumulemibiw_xefatijimumugij_jamiladatetexo_rorafure.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/bujitusufalufepodusinorer.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/89600701682.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/potefeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/36581453154.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/convert_scanned_to_word_document_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/42826893606.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/bowozixuliwiwomugumobaja.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/dufoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/bodybuilding_training_program_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/lofitamawakakenol.pdf
    • https://cdn.shopify.com/s/files/1/0430/1773/2249/files/fatty_acid_beta_oxidation.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_off00004dd9.bin
6efa1467d46f355e7504b87ff9d5ecbefc87dc0c2d8e6c2d1dc2077fd3f715cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD9 5148 bytes
font_01_sfnt_off00005f65.bin
45b0e6d88479e59fed8e65a2ce0c0a5af5c23ebda67f8e937e2c2daa93cd06ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F65 10404 bytes
font_02_sfnt_off000082f0.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F0 4324 bytes

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