Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82ba820d1d50591…

MALICIOUS

PDF

44.4 KB Created: 2020-07-30 11:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07e1c6e278f26c75a9516bfe5e817593 SHA-1: b0bb5b132163d31b4c02378965e048f3b608e846 SHA-256: c82ba820d1d50591c1b80759902401d31bf0ca49b56907de14fd6da8dddcb26c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, which are likely part of a link farm designed to obscure malicious redirectors. The primary malicious URL identified is ttraff.com, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains keywords related to 'Simulia abaqus training pdf', suggesting a lure to attract users interested in technical training materials. The ML classifier strongly indicates 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.com/pify?keyword=simulia+abaqus+training+pdf
    • http://files.autotechccc.com/uploads/1/3/1/6/131606492/mujisunaguv.pdf
    • http://files.jerrycancompany.com/uploads/1/3/2/3/132302978/243ea979533281.pdf
    • http://files.jsucontestofchampions.com/uploads/1/3/0/8/130813701/dafaba.pdf
    • http://files.rfplfoundation.org/uploads/1/3/1/4/131437702/masebopepu-pilifuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/jusoruro.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/bopabixokapodugawer.pdf
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/10260159574.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/92991378279.pdf
    • https://cdn.shopify.com/s/files/1/0432/1230/8637/files/vibobiduxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.pdf
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/47815552743.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/fekuzajolatujujomozuxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3547/5624/files/95387962377.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/vanenupirikanepapizuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/91888489647.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/57451987115.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/76533063057.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee6.bin
da1388f3d1c921cf62c4fc9ea7728cbbc90fdd54f7f65805f4eac0808d3b2b4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 5384 bytes
font_01_sfnt_off000080f4.bin
10fcf25a81eb18c2b14e45ca8ef36af1fd4facbca99ba16e34b334c77c882ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F4 10208 bytes

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