Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bd31d581ae5ff3…

MALICIOUS

PDF

48.6 KB Created: 2020-09-19 14:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fb161ce603a99b9c2e3e08fd4139854 SHA-1: e9b38ac11f6727c4a7f069c793837852bffa3c2a SHA-256: 65bd31d581ae5ff39a58ca30a5022242784bc9df4fb803fd9090149f7ee405f1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into clicking it. The presence of numerous other PDF links, some benign and some unknown, further supports the idea of a link farm or redirection scheme designed to lead users to malicious content.

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.me/wix?keyword=barron%2527s+act+36+pdf
    • http://zorosamoj.snowhillmodeltrains.com/uploads/1/3/1/6/131637814/duseretunikepip_dizuselubodose.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://8e0b6408-89e3-4ad3-bc3f-e1829492f2aa.filesusr.com/ugd/7b00a0_3e659c6a33a9481c9f58a680a4e52b68.pdf?index=true
    • https://e5f7d3e0-9d33-46e2-a5eb-5cefcb1dcc2f.filesusr.com/ugd/02ccf7_8c96290728ee4b1aa552229d2c1c6449.pdf?index=true
    • https://a31ce0a0-34cd-4e48-a1ff-93b11a6e9063.filesusr.com/ugd/5899d5_01ee614d0bbb4f56a80ade28fe6ec46d.pdf?index=true
    • https://05927199-e7d6-489d-bccf-0edaae9632c4.filesusr.com/ugd/bae0a0_9184f60aeed1409fab17eefee704f66b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/3848018289.pdf
    • https://cdn.shopify.com/s/files/1/0457/0588/7900/files/dieta_1200_calorias_diarias_menu_sem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/adventure_time_season_9_episode_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9669/files/38263557466.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/new_wave_cooker.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/46677259871.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_off000072cd.bin
dea7b8d75eb90fc6b308e79eb2e6dd3d5d7ed8512d20756894e31b41739d20c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 5140 bytes
font_01_sfnt_off00008440.bin
1e688ba1a6d4d467376e7c59d174c4d5cdcf0f839d822a3de15c5a68c07214db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8440 10344 bytes
font_02_sfnt_off0000a7b3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B3 4324 bytes

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