Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f404cdb4c9f353…

MALICIOUS

PDF

62.3 KB Created: 2020-08-19 09:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bf173abbbcce30fafcda18fb5090994 SHA-1: 9b9afd9136ab0189bfd33582a3552c326bd2ebb6 SHA-256: 95f404cdb4c9f35364af064c5e3752c71755adb96ed688629df6c9ca820a3847
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector (ttraff.cc). This redirector likely serves as a lure to a phishing or malware distribution site. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation or to obscure the final malicious destination. No scripts were extracted, but the primary malicious functionality appears to be the redirection via the embedded malicious link.

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=carbonic+acid+solubility+chloroform
    • http://files.rantofaretailer.com/uploads/1/3/2/3/132302998/af4c8da2dcc.pdf
    • http://pimefu.uclagoingglobal.org/uploads/1/3/1/3/131383648/3b41919869a.pdf
    • http://xiputo.soldiershomestories.com/uploads/1/3/0/7/130739206/wafiju.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/nergies_renouvelables.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/xedikekusimuwem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/jebifuzoroko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8097/4490/files/converting_metric_units_worksheet_gcse.pdf
    • https://cdn.shopify.com/s/files/1/0441/0467/9576/files/california_dmv_forms_statement_of_facts.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/83887754621.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/accelerated_learning_crash_course.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/vugotolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/tikusarazak.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/concept_of_habitat_and_ecological_niches.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.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_off000092b2.bin
969421bd2cbdb375bf4bd496180d4a26b89b99cfb8bb53ae16d7539dc26c9f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B2 5408 bytes
font_01_sfnt_off0000a4ed.bin
1a5861cb6bafc2dd0587800515a99059c2e7df4e39604f16aeda3538de81cfce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4ED 15672 bytes
font_02_sfnt_off0000d5f5.bin
2bed145ec37c4237ed3a284be3560ceaf3576cec8e354facffbc835779d18ba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F5 16408 bytes

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