Malicious PDF — malware analysis report

Static analysis result for SHA-256 46504cb08199da65…

MALICIOUS

PDF

51.0 KB Created: 2020-08-02 16:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca7c0a86a1c1517187a6389237e778e5 SHA-1: e88aa29a80235199625e39373bdf1a4d144fef4f SHA-256: 46504cb08199da656a47352e0cd6faa06729fef963ea1ebe94f87954ee407934
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and a Github-related keyword, suggesting a social engineering lure. The ML classifier also strongly indicated maliciousness.

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=github+make+new+branch
    • http://files.kwingard.com/uploads/1/3/1/6/131637177/mawezowojob.pdf
    • http://files.houseofdiamondsart.com/uploads/1/3/1/0/131070450/buwerenokivoje.pdf
    • http://files.haydensheroesmd.org/uploads/1/3/0/8/130874379/4112727.pdf
    • http://files.mrgscience.com/uploads/1/3/0/7/130740053/gatirivij-wabixaja-sefebozeminib.pdf
    • http://files.juabchoirs.org/uploads/1/3/1/4/131453193/5539173.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/tobebawawufupig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/naxiwuxebuwux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46824776831.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/55680475132.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/puxodaxokogepitaka.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/66823312934.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/sizalozed.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/88457602717.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/gerevoxutijepuwigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/65556765159.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/67786967319.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/wizidil.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_off00007397.bin
252f302409f6915558d0aebd72e3582cc444ca6314974b105b7e4a771154f718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 5156 bytes
font_01_sfnt_off0000850b.bin
747f70fe69c5c432980fc89db9f0ab847b668f8fd0e8ce1251f092e94a661df3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850B 10448 bytes
font_02_sfnt_off0000a8f0.bin
792d94d721ed0b6f37dc0a2c63227a1e02ba985f3311c734d905b891e1ee35e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F0 16388 bytes

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