Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e6ad95b1516ebc…

MALICIOUS

PDF

41.1 KB Created: 2020-08-05 10:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ab5eb2f6a8c63cbf57cb9c46954d251 SHA-1: afc3ba5f22c828c982db924da6e48890e163d2a0 SHA-256: 68e6ad95b1516ebcd36311697094ee10e113526420d9af22f216ab60a1fe0a30
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=all+yours+stranger+pdf+free'. The document body, though obfuscated, also contains this URL and other links to what appear to be a PDF link farm. This suggests the primary purpose is to lure users to malicious sites, likely for further exploitation or phishing.

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.ru/pify?keyword=all+yours+stranger+pdf+free
    • http://files.animaladvocacycareers.org/uploads/1/3/1/4/131438676/8029948.pdf
    • http://files.waverlyestates.com/uploads/1/3/1/8/131856257/51b0f6ac246e35.pdf
    • http://files.gregglohman.com/uploads/1/3/2/8/132815123/5c015e40b.pdf
    • http://files.saintgregorys.org/uploads/1/3/1/3/131383541/mokogofobu_vivavolabuxe_sizirugadisazat.pdf
    • http://files.curiouscreativecritical.com/uploads/1/3/2/6/132682806/timoxokofin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifizazuxapi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/gomarasovesutalemas.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/62933458739.pdf
    • https://cdn.shopify.com/s/files/1/0429/0697/6422/files/tovepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/bivizoturawoxujir.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/26902659691.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/woguzapasaluruxaluvokotug.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/50248221255.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/tazutirelujaxivalil.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/18954351293.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/69910360999.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/nibewusezofuwubogadudo.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_off00006272.bin
3afe13eddf20a7db685eb92b4ba2a6a0945a625efa481f2bd451459a55bf0156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 5300 bytes
font_01_sfnt_off00007497.bin
23fc8d7290dab50ea9a2e9324077cc5f88577855324fb9c46bfe1211e7571a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 10260 bytes

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