Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a4e794feee4b4d…

MALICIOUS

PDF

59.6 KB Created: 2020-08-03 06:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d5eab827f79e4b1c0cbd5a29bcc9080 SHA-1: 48b9e1234aacd4a714a2b97357d5a8f24c09128f SHA-256: 06a4e794feee4b4d9a3ad219f759610381f7b4440dc70ba185bd05b70fe8e752
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body also contains this URL, suggesting an attempt to direct the user to malicious infrastructure. The presence of numerous external PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the ML classifier strongly suggests malicious intent.

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=kalpakjian+manufacturing+engineering+and+technology+pdf
    • http://files.jimmarshart.com/uploads/1/3/1/4/131452922/4695845.pdf
    • http://files.teachershopllc.com/uploads/1/3/1/8/131871704/zenoju-rifaxoteti.pdf
    • http://files.nicoleandersonconsulting.com/uploads/1/3/1/4/131437330/fagivese-nuxivizelava-wajetoposuluz-dolosexi.pdf
    • http://files.thamesvalleyquiltersguild.com/uploads/1/3/2/6/132681517/woretep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0445/9633/0660/files/ozzy_osbourne_road_to_nowhere.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/ramij.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/turezasomixodipumavobal.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/install_dmg_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/82318941214.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/10848233902.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82127534182.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/basugogigarerebid.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1288/files/an_enthusiastic_gilled_blob_is_on_screen.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/36902281063.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/66091167655.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_off00009c2b.bin
62c90a4668747974b639d30171b24451602e0b60a2eb770f1580f6a10ab54f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2B 5484 bytes
font_01_sfnt_off0000aea9.bin
b70cc9a9dac04262bc1f98d20546d85eb61c7647bb00eb5b2a85f56a121f1aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA9 10540 bytes
font_02_sfnt_off0000d28c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD28C 4324 bytes

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