Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0e73c22408f859…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 14:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aaa896b06aeba854a7c5d6a199c1437 SHA-1: bcc8625f5460a4ae08eadad7bc3eded321b2e457 SHA-256: 5c0e73c22408f85976641c3b78b134c27cbde2c20742ed17151970b77441b800
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=list+of+essential+oils+and+their+uses+pdf', which is also flagged as a malicious redirector. This suggests the document's primary purpose is to trick users into visiting this malicious URL, likely leading to further malware delivery 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.com/pify?keyword=list+of+essential+oils+and+their+uses+pdf
    • http://files.bodygodzmassaj.com/uploads/1/3/1/6/131637148/nonivatinot.pdf
    • http://files.spinecarechiropractic.net/uploads/1/3/1/3/131384018/30437.pdf
    • http://naluxepu.openheartmindfulness.org/uploads/1/3/1/0/131070993/aaa33be4539.pdf
    • http://files.ceciliafernandezfotografia.com/uploads/1/3/1/6/131606275/3218515.pdf
    • http://files.conceptmedley.com/uploads/1/3/1/4/131406403/6706299.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5650/2686/files/clearone_beamforming_microphone_array_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7357/6865/files/99247987354.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7427/files/94882791639.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/pensar_la_arquitectura_peter_zumthor_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/non_verbal_reasoning_aptitude_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/alelos_multiplos.pdf
    • https://cdn.shopify.com/s/files/1/0434/9663/6580/files/kagununebanabekid.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/rakivikusoxigo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/99136181207.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/zamowarufulunowifefuriw.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/butejivowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/63626108098.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_off00007659.bin
3b4c594582e1d1f2e7e2a22f7b7fcd41dcc3b11217c4f93d124e86bfbe19bece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7659 5072 bytes
font_01_sfnt_off00008790.bin
049806a4d2ef42c4a451827348e711d644892f76fc432ebf1206294ab58d49aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8790 10292 bytes

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