Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c70011d531904af…

MALICIOUS

PDF

41.2 KB Created: 2020-08-04 03:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f211c049263027f721760de75b10d34 SHA-1: 0f976fbee8a619e78a54f8079ca66dd8eb440a32 SHA-256: 0c70011d531904af9c1f313c43e5532e71321da09a3ca53c336064d0fa99ff0f
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to 'ttraff.com', indicating a malicious redirection attempt. The document body, though heavily obfuscated, contains the same URL, suggesting the intent is to lure the user to a potentially malicious site under the guise of downloading a worksheet. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a phishing or scam attempt.

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=estimating+square+root+worksheet+8th+grade+pdf
    • http://files.unityofpalmyra.org/uploads/1/3/1/4/131405948/458530e4.pdf
    • http://files.nlrtsa.com/uploads/1/3/0/7/130775017/finoti-ravorifapox-zopokubupa-dakiviperibu.pdf
    • http://files.ashleyskinnertherapy.com/uploads/1/3/1/3/131383045/162ef53f549855.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/7814/7491/files/51395180029.pdf
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/63962824689.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/pulp_fiction_synopsis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/4975492665.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/basic_technical_mathematics_with_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/widomani.pdf
    • https://cdn.shopify.com/s/files/1/0429/1900/2279/files/sunset_sarsaparilla_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/rules_of_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/30906987564.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/pagejituvokuraxeguluzewo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/how_to_change_your_discord_name.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4884/files/demilozaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/kondisi_geografis_negara_asean.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_off000053be.bin
585cbccb59f19d8d2a51eae18862323eaf38f7d5012f35c7a1afc7da7666dfc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BE 5740 bytes
font_01_sfnt_off00006726.bin
077b8146fad04234248b71b87afc55bcf7b25f8497c7fe30a393f2433e6e11f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 9996 bytes
font_02_sfnt_off00008970.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8970 4324 bytes

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