Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d007e33c0a57c1…

MALICIOUS

PDF

58.8 KB Created: 2020-08-14 20:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d7f41364351952548063a509e45d237 SHA-1: 2bfcbd91f54042a5174c8233a8a64f9d0e0341c2 SHA-256: 82d007e33c0a57c16407ebed1b2e1a0d2dff8563037a617852d4023c93727876
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 pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL and benign Shopify URLs, suggesting an attempt to disguise malicious activity within a large number of links. No scripts were extracted, but the presence of malicious links indicates an intent to redirect users to harmful 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=bhojpuri+film+karan+arjun+video
    • http://jijefoxaw.northernlightsadaptations.com/uploads/1/3/1/4/131438216/1f4342dd741.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/10780317700.pdf
    • https://cdn.shopify.com/s/files/1/0428/1401/3606/files/21749040662.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/nowakizomunalevilid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/kazowivorifularo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/bodinosilitemalujububom.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/chatbot_aiml.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/dakedifexefemakarim.pdf
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/69190253464.pdf
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/english_story_for_beginners_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/btec_level_2_first_hospitality_student_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/tuziperepudotoluburizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/59452966480.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bbb.bin
754ff909439dbe14418ec00734bf11cb19e4021e1d8cd2e34e31981039c66e98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBB 5152 bytes
font_01_sfnt_off0000ad20.bin
ea4fd0e868b5783d90da09927d732504bbcc10a931b78ca2e7f160db35aa60a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD20 10240 bytes
font_02_sfnt_off0000d015.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD015 4324 bytes

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